Chronic Cough (≥3 weeks)
Information and suggested lab tests.
What it is
Cough lasting more than 3 weeks can be due to allergy, asthma, reflux, smoking, or infection. Targeted tests help narrow the cause when needed.
Diagnosis and tests
CBC and CRP/ESR may be used to assess inflammation. If TB is suspected, sputum AFB and TB tests may be advised based on risk and symptoms.
Treatment and management
Management depends on cause. Seek evaluation if warning signs are present or cough persists.
This is general information and does not replace medical advice. For diagnosis or treatment decisions, consult a qualified clinician.
FAQs
Is it always serious?
Not always, but persistent cough should be evaluated.
Can reflux cause cough?
Yes, reflux can contribute to chronic cough in some people.
When should I test for TB?
If cough is prolonged with weight loss, fever, or night sweats.