Chronic Cough at a Telehealth Visit

Learning objectives#

• Use cough duration, red flags, epidemiology, medicines, and associated symptoms to decide whether telehealth should continue or convert to urgent in-person care.
• Distinguish what can be observed by video from what requires auscultation, chest imaging, spirometry, laboratory testing, or direct examination.
• Build a treatable-traits differential that includes medicine effect, airway disease, rhinosinusitis, reflux, infection, serious pulmonary disease, and cough hypersensitivity.
• Choose diagnostic trials with a defined rationale, outcome, duration, and stop rule rather than stacking empirical treatments.
• Design a telehealth emergency, follow-up, and access plan that remains safe if technology fails.

Initial presentation#

A 52-year-old woman schedules a video visit for a dry cough that has persisted for eleven weeks. It began gradually without a clear febrile illness, and she describes a throat tickle followed by several coughs, especially while speaking for long periods, walking into cold air, or smelling strong cleaning products. The cough sometimes wakes her once at night. She has mild nasal congestion and clear drainage but no daily sputum.

She denies coughing blood, fever, night sweats, and unintentional weight loss. She denies chest pressure, fainting, new leg swelling, and severe breathlessness. She denies trouble swallowing, persistent hoarseness, or choking with meals. She can climb one flight of stairs without stopping, although talking while climbing can trigger cough. She has never smoked or vaped. There is no known tuberculosis contact, recent incarceration, or shelter residence. There is no high-prevalence travel, immune suppression, or prior cancer.

Her history includes hypertension and seasonal rhinitis. Four months ago, her blood-pressure medicine was changed to an angiotensin-converting enzyme inhibitor. She uses no inhaler. She reports occasional heartburn after large late meals but no regurgitation or consistent meal or position relationship. She works from home without a clear irritant pattern, and a cat has lived there for years.

The clinician confirms her current address, callback number, emergency contact preference, and nearest emergency service. On clear video she sits comfortably, speaks in full sentences, and has normal color without visible accessory-muscle use. Home oxygen and temperature readings look normal, although the clinic has not validated the devices. A short walk across the room triggers two coughs without distress.

She asks for an antibiotic and a strong cough suppressant because travel to the clinic requires an hour each way.

Problem representation#

This is a stable adult with a minimally productive cough lasting longer than eight weeks, making it chronic by CHEST, ERS, and BTS conventions. The cough is triggered by talking, cold air, and odors and is accompanied by nasal symptoms. It began after initiation of an angiotensin-converting enzyme inhibitor. There are no disclosed emergency symptoms, major infection features, smoking history, or clear tuberculosis risks.

The leading working possibilities are medicine-associated cough, rhinitis or chronic upper-airway inflammation, asthma-spectrum or eosinophilic airway disease, and cough hypersensitivity. Reflux is possible but weakly supported. Lung cancer, tuberculosis, interstitial lung disease, bronchiectasis, heart failure, aspiration, and other important disease remain lower-probability alternatives that cannot be excluded by a video appearance or a normal home oxygen reading.

The disposition is therefore nonemergency but not video-complete. The visit can establish an emergency plan, reduce immediate risk, and organize a timely in-person assessment. It cannot safely close the diagnosis or justify several blind treatment trials.

Prioritized differential#

1. Angiotensin-converting enzyme inhibitor associated cough#

Reasoning for: The medicine was started several weeks before the cough, and this class can produce a persistent dry cough. The timing is plausible, and the cough lacks a better established cause.

Reasoning against or still uncertain: Timing does not prove causation. Nasal symptoms and irritant triggers suggest additional traits, and a serious pulmonary cause could coexist. Improvement after a clinician-directed medicine change supports the diagnosis retrospectively, but improvement can take several weeks and incomplete response requires continued evaluation.

2. Rhinitis or chronic rhinosinusitis-related upper-airway inflammation#

Clear drainage and congestion support rhinitis. A complete history asks about sneezing, itching, and reduced smell. It asks about facial pain, purulent drainage, seasonal pattern, and indoor triggers. Chronic rhinosinusitis requires a compatible symptom pattern over time rather than a casual label of postnasal drip. Nasal symptoms may be a treatable contributor here without being the single cause.

3. Asthma, cough-variant asthma, or nonasthmatic eosinophilic bronchitis#

Nocturnal cough and cold-air triggering can occur with airway hyperresponsiveness. Asthma may present without audible wheeze, and telehealth cannot determine whether airflow obstruction or wheeze is present. Spirometry with bronchodilator testing and selected type 2 inflammation markers can make a targeted treatment trial more meaningful. Normal baseline spirometry would not completely exclude asthma, and normal spirometry plus low eosinophilic markers would make indiscriminate inhaled corticosteroid use less attractive, because a treatment response alone is not a perfect diagnostic test.

4. Cough hypersensitivity#

Talking, cold air, cleaning odors, a throat tickle, and a dry cough are compatible with heightened cough-reflex sensitivity. BTS and ERS describe cough hypersensitivity as common in chronic or refractory cough. It should not be used prematurely to dismiss airway, pulmonary, cardiac, medicine, or infectious causes. It becomes more useful after treatable traits and warning signs have been assessed.

5. Gastroesophageal reflux#

Intermittent heartburn makes reflux possible, but the pattern is weak. BTS advises against routine acid suppression for cough without typical symptoms or other acid-reflux evidence because most patients do not improve. Her symptom justifies proportionate reflux assessment, not an assumption that reflux explains the cough.

6. Postinfectious cough, pertussis, or another respiratory infection#

A postinfectious cough can persist, but she recalls no preceding syndrome. Paroxysms, inspiratory whoop, post-tussive vomiting, or a compatible contact would raise pertussis concern. Antibiotics are unlikely to help without evidence of an active bacterial infection.

7. Chronic productive airway disease#

Chronic bronchitis, bronchiectasis, and suppurative airway disease are less likely because she has never smoked and produces little sputum. Daily sputum, recurrent infections, hemoptysis, crackles, or an abnormal radiograph would change this branch and may justify computed tomography.

8. Lung cancer, tuberculosis, interstitial lung disease, or another serious pulmonary cause#

Why they cannot be missed: Cancer, tuberculosis, fibrotic lung disease, and other pulmonary disorders may begin with cough. Hemoptysis, weight loss, fever, or night sweats would raise urgency. So would persistent hoarseness, progressive breathlessness, or clubbing. So would abnormal chest findings, immune suppression, smoking, or relevant epidemiology.

Their absence and her never-smoking history lower current probability but do not make it zero. CDC lists prolonged cough, chest pain, sputum or blood, and weakness among pulmonary tuberculosis features. The list also includes weight loss, fever, chills, and night sweats. Testing follows symptoms and epidemiologic risk.

9. Cardiac, thromboembolic, aspiration, or laryngeal disease#

Heart failure rises with orthopnea, edema, weight change, or cardiac findings. Pulmonary embolism is unlikely in an isolated stable eleven-week cough but becomes urgent with acute pleuritic pain, breathlessness, fainting, hypoxemia, or thromboembolic risk. Dysphagia, choking, or recurrent pneumonia raises aspiration. Persistent voice change, dysphagia, or inspiratory noise may require laryngeal evaluation.

Focused history and examination#

Questions that change urgency or probability#

• Time course: Exact onset, pattern, progression, prior infection, and whether cough is dry or productive.
• Emergency and cancer features: Hemoptysis, breathlessness, chest pain, syncope, cyanosis, fever, night sweats, weight loss, dysphagia, hoarseness, and neck swelling.
• Airway pattern: Wheeze, tightness, exercise and nighttime symptoms, seasonal change, allergies, prior asthma, and inhaler response.
• Upper airway and reflux: Nasal symptoms, smell change, facial pressure, throat clearing, heartburn, regurgitation, meals, position, and swallowing.
• Infection and epidemiology: Tuberculosis risks, immune status, travel, congregate settings, contacts, and pertussis-like symptoms.
• Medicines and substances: Angiotensin-converting enzyme inhibitors, inhaled and nonprescription products, tobacco, vaping, and cannabis.
• Environment and function: Dampness, mold, smoke, combustion, pets, occupational irritants, and effects on sleep, work, continence, voice, and mood.

What video can and cannot contribute#

Video can show appearance, speech, and respiratory effort. It can show gross color, cough during the call, and selected self-performed maneuvers. Patient-generated vital signs add context when device and technique are understood. The clinician documents who performed them and what remained unassessed.

Video cannot provide reliable auscultation with ordinary equipment, diagnostic spirometry, or a chest radiograph. It cannot provide full lymph-node and oral examination, palpation, or a validated assessment for clubbing and subtle cyanosis. Lighting, camera processing, and skin tone can obscure findings. So can perfusion, nail products, device quality, and connectivity. A reassuring screen image is not a complete cardiopulmonary examination.

Diagnostic strategy#

First decide the right setting#

The clinician screens for emergency features before pursuing a long differential. Because this patient is stable, has no disclosed red flag, and can access care with planning, the visit continues. An in-person appointment is arranged within the next week rather than after a sequence of failed video prescriptions. If travel becomes impossible, the team identifies a nearer primary-care, urgent-care, imaging, or pulmonary-function option.

The telehealth plan records the patient's exact location, local emergency route, callback procedure, and what will happen if the connection fails. HHS guidance emphasizes planning these details because the clinician and patient are not in the same controlled setting.

Complete the basic chronic-cough assessment#

At the in-person visit, the clinician repeats vital signs and performs direct upper-airway, lymph-node, and cardiac examination. The examination also covers pulmonary, edema, and general findings. BTS recommends chest radiography and diagnostic spirometry, preferably with reversibility testing. A blood count and type 2 inflammation markers can support selected airway decisions.

Tests are tied to a question:

• Chest radiograph: Looks for infection, mass, interstitial pattern, heart enlargement, and other structural clues without eliminating all risk when normal.
• Spirometry with bronchodilator response: Evaluates airflow obstruction and reversibility; technique and clinical suspicion affect interpretation.
• Blood count and eosinophilic markers: Assess selected systemic clues and a type 2 inflammatory signal that can guide an anti-inflammatory trial.
• Sputum testing: Reserved for a productive cough or specific infection concern.
• Tuberculosis testing: Chosen for compatible symptoms, imaging, immune status, or epidemiology, with public-health coordination when active disease is suspected.
• Computed tomography: Not routine first-line imaging. It becomes useful for an abnormal radiograph, suspected bronchiectasis or interstitial disease, hemoptysis, cancer concern, or persistent unexplained cough after initial evaluation.

Broad allergy panels, repeated antibiotics, and sinus computed tomography are not automatic. Neither are endoscopy, reflux studies, and bronchoscopy. Each is selected when a phenotype, result, or failed targeted plan makes it actionable.

Progressive results and interpretation#

At the in-person visit, temperature, pulse, and respiratory rate are within expected ranges. So are oxygen saturation and blood pressure. She speaks comfortably. There is mild nasal mucosal swelling and clear discharge, without persistent dysphonia, neck mass, or oral lesion. There is no clubbing, edema, or focal neurologic finding. Lungs are clear on direct auscultation, including with a forced expiration. A normal examination lowers immediate concern but does not replace testing.

The chest radiograph shows no focal opacity, mass, interstitial pattern, or heart enlargement. The full blood count is unremarkable. Spirometry is technically acceptable and within expected limits, without a significant bronchodilator response. Fractional exhaled nitric oxide and blood eosinophils are low.

These results make pneumonia, visible mass, overt interstitial disease, persistent obstruction, and a clearly eosinophilic trait less likely. They do not fully exclude intermittent asthma or other lung disease. The medicine timing and rhinitis now carry more weight, while reflux remains weakly supported.

The prescribing clinician changes the blood-pressure medicine to a suitable alternative after reviewing blood pressure goals, kidney function, and potassium. The review also covers pregnancy possibility where relevant, prior reactions, and access. Five weeks later, cough frequency has fallen by about two-thirds, nighttime waking has stopped, and talking is less provocative. Nasal congestion and odor-triggered throat tickle persist.

The partial response supports a medicine contribution but also shows that the cough had more than one trait or that cough sensitivity has not fully settled. It does not justify declaring every future cough medicine-related. The residual pattern directs attention toward rhinitis and cough hypersensitivity while continued surveillance protects against a missed diagnosis.

Management plan#

Remove plausible causes with coordinated prescribing#

The angiotensin-converting enzyme inhibitor is not stopped by website instruction or without a replacement plan, and the prescriber weighs its indication, kidney and potassium status, blood pressure, cardiovascular history, pregnancy considerations, and alternative classes. The patient is told that improvement may take several weeks and that lack of response reopens the differential.

For rhinitis, saline and an intranasal anti-inflammatory may be considered with instruction on technique, irritation, nosebleed risk, and response review. Irritant reduction follows a credible pattern; removing a long-standing pet or buying expensive products without evidence is excessive.

Match airway and reflux treatment to evidence#

An inhaled corticosteroid is not started solely because cough can be asthma. A time-limited therapeutic trial can be planned if later testing, history, variability, or type 2 biomarkers support an asthma-spectrum trait. The trial includes technique review, adherence check, objective outcome, and a stop rule. Persistent or high-risk asthma features require the current disease-specific guideline.

Acid suppression is not prescribed as a universal cough trial. Her occasional heartburn is addressed with proportionate meal-timing and reflux counseling, and treatment is considered if typical symptoms or objective evidence justify it. Dysphagia, bleeding, anemia, persistent vomiting, or weight loss would require a different gastrointestinal pathway.

Antibiotics are not used for a chronic dry cough without evidence of a bacterial disease. Strong cough suppressants and neuromodulators can cause sedation, dizziness, constipation, interaction, and impaired driving. They are not first-line substitutes for cause assessment.

Address cough hypersensitivity and function#

If cough persists after identified traits are addressed and serious disease remains unlikely, referral for pulmonary review and cough-control therapy with appropriately trained speech and language or physiotherapy professionals may help. Education can cover cough-suppression strategies, laryngeal hygiene, breathing pattern, and graded return to speaking tasks. Neuromodulator or opioid options for refractory chronic cough require specialist selection and medication-safety review; exact regimens are intentionally omitted. The plan also asks about sleep, work, and urinary leakage. It asks about voice strain, mood, and social avoidance, because treating the diagnostic label without the consequences leaves major disability unaddressed.

Escalation, referral, and safety net#

Emergency care replaces telehealth for severe or rapidly worsening breathlessness, inability to speak in full sentences, or blue or gray color. It replaces telehealth for confusion, fainting, severe chest pressure, or stridor. It replaces telehealth for signs of anaphylaxis, major hemoptysis, or another sign of acute instability. Acute pleuritic pain with breathlessness, fainting, or unilateral leg swelling also requires urgent thromboembolic assessment. A concerning oxygen reading is repeated with correct technique if time and stability allow, but emergency action is not delayed to troubleshoot a device.

Same-day or prompt in-person evaluation is appropriate for new blood-streaked sputum, fever with systemic illness, or progressive breathlessness. It is appropriate for falling exercise tolerance, persistent hoarseness, or dysphagia. It is appropriate for weight loss, recurrent pneumonia, or immune suppression. It is appropriate for tuberculosis risk, abnormal imaging, or a clinician's unresolved concern. The exact urgency reflects severity, trajectory, and local pathways.

Pulmonary referral is appropriate for abnormal basic tests, suspected lung disease, persistent red flags, or unexplained cough after targeted care. Ear, nose, and throat review follows persistent voice or swallowing features. It also follows nasal or laryngeal features. Other specialties are selected by the actual pattern rather than used as a referral cascade.

If video or audio fails during a stable visit, the clinician calls the verified number and reschedules or converts to an appropriate setting. If it fails during a possible emergency, the prearranged local emergency plan is activated. A portal message is not an emergency response system.

Communication, shared decisions, and equity#

The clinician validates the burden while setting a boundary: "Your cough has lasted long enough to need a structured assessment. The video tells me you do not look acutely unstable right now, but it cannot listen to your lungs, perform breathing tests, or obtain an image. The safest next move is an in-person examination and basic testing, not several treatments at once."

The antibiotic request is addressed without dismissal. The clinician explains what would make an antibiotic useful, why the current pattern does not, and how unnecessary treatment can cause harm. Shared decisions include a reachable clinic, tests coordinated on one travel day, and symptoms that override the schedule.

Telehealth access is unequal. Broadband, device quality, and data limits can each affect what the clinician sees and whether follow-up happens. So can hearing, vision, and language. So can digital skill, privacy, work schedule, and caregiving. So can rural distance, disability, and transportation. A professional interpreter and accessible written instructions are provided when needed. The patient is not asked to perform an unsafe exertion test or complex self-examination to compensate for unavailable in-person care.

Cough can carry stigma because others may assume infection. The discussion separates respiratory hygiene during active infectious symptoms from blame. The clinician also asks permission before involving a family member and confirms that the patient can speak privately about smoking, home conditions, medicines, and safety.

Follow-up and contingencies#

The first follow-up confirms completion and quality of the chest radiograph and spirometry, not merely that orders were placed. It reviews medicine changes, blood pressure and laboratory monitoring, and nasal symptoms. It reviews cough frequency, nighttime waking, function, and any new warning sign. A simple patient-reported baseline allows a treatment trial to be judged rather than remembered vaguely.

The plan contains four branches:

• Cough resolves after the medicine change: Record the likely adverse effect, keep the alternative blood-pressure plan monitored, and provide a return threshold for a new cough.
• Cough partly improves: Identify the remaining trait, as occurred here, and address it one at a time rather than adding several treatments.
• Cough does not improve but basic tests are normal: Reassess adherence, the original history, intermittent asthma, rhinosinusitis, reflux evidence, aspiration, sleep apnea, laryngeal disease, and cough hypersensitivity; consider pulmonary referral.
• A red flag or abnormal test appears: Accelerate imaging, infection evaluation, or specialist care according to the finding rather than continuing an empirical trial.

A normal radiograph is not permanent clearance. New hemoptysis, weight loss, progressive breathlessness, focal chest findings, or persistent high clinical concern can justify further imaging or referral. Conversely, routine repeated computed tomography in a stable low-risk patient creates radiation, incidental findings, cost, and anxiety without assured benefit.

Reasoning traps and alternative pathways#

• Treating a clear video as a clear lung examination: Camera quality and a comfortable appearance cannot exclude subtle or structural disease.
• Letting a home oxygen number close triage: Device quality, technique, perfusion, motion, and trend matter, and some serious causes of cough do not lower oxygen saturation early.
• Calling every chronic cough asthma: Airway history, spirometry, biomarkers, variability, and a planned treatment trial provide a stronger basis.
• Prescribing antibiotics for duration alone: Eleven weeks does not prove persistent bacterial infection.
• Using acid suppression as a diagnostic reflex: Reflux treatment is unlikely to help many patients without typical symptoms or supporting evidence.
• Stopping a cardiovascular medicine without coordination: The suspected adverse effect and the original indication both need a safe plan.
• Calling a normal radiograph definitive: It lowers selected probabilities but does not erase persistent red flags or high-risk context.
• Ordering computed tomography for everyone: Advanced imaging is selected by abnormal results, risk, phenotype, or unresolved disease concern.
• Labeling the cough psychological: Mood and stress can affect symptoms and quality of life, but they do not replace medical evaluation or the biology of cough hypersensitivity.
• Stacking trials: Simultaneous antibiotic, inhaler, nasal treatment, acid suppression, and suppressant use makes benefit and harm impossible to interpret.

An alternative pathway would be immediate if the first history revealed major hemoptysis, respiratory distress, or syncope. Weight loss and tuberculosis risk would prompt infection-control and diagnostic planning. A smoking history with persistent hoarseness would increase cancer urgency. Daily purulent sputum and recurrent infections would favor bronchiectasis assessment. Orthopnea, edema, and heart enlargement would move cardiac disease upward. Each branch changes both the test and the appropriate setting.

Evidence limits and what could change#

CHEST, ERS, BTS, and ACR agree on a structured history and warning-sign assessment. They agree on chest radiography and selective further testing. But they differ in terminology, evidence grading, available biomarkers, and health-system assumptions. The BTS document is a clinical statement rather than a fully graded guideline. Its practical recommendations reflect UK practice, including access to fractional exhaled nitric oxide, which is not universal.

The evidence for many chronic-cough treatment sequences is limited, and cough often has several contributors. A response to stopping an angiotensin-converting enzyme inhibitor is persuasive but not definitive. Normal spirometry can miss intermittent asthma, and a normal radiograph can miss some airway, early interstitial, or malignant disease. Cough hypersensitivity has no single confirmatory test.

HHS telehealth resources describe process, documentation, virtual examination, and emergency planning; they are not chronic-cough diagnostic guidelines. Little evidence defines exactly which chronic-cough patients can be managed remotely from start to finish. Licensure, privacy, emergency routing, prescribing, and patient-generated device rules vary by location. Pregnancy, immune suppression, or cancer would change this pathway as well. So would significant smoking, migration history, or occupational lung risk. So would neuromuscular disease, swallowing dysfunction, or severe cardiopulmonary disease. Local guidance and direct evaluation remain necessary.

Key points#

• Telehealth can establish chronicity, warning signs, epidemiology, medicines, function, and disposition, but it cannot replace tests or direct examination that the differential requires.
• A chronic cough often reflects interacting treatable traits; medicine effect, rhinitis, airway disease, reflux, infection, serious lung disease, and cough hypersensitivity should remain proportionate.
• Chest radiography and diagnostic spirometry are basic parts of adult chronic-cough evaluation, while computed tomography and specialized testing are selected by risk and results.
• Treatment trials need a rationale, measurable outcome, review point, and stop rule; stacking empirical treatments obscures both diagnosis and harm.
• Every telehealth plan needs the patient's location, a connection-failure pathway, explicit emergency and in-person thresholds, and realistic support for travel, language, technology, and follow-up.