Hi,
A cough is a reflux action to clear your airways of mucus and irritants like dust or smoke. A dry cough means it is tickly and doesn't produce any phlegm or thick mucus. Persistent dry cough may be caused by a long term
respiratory tract Infection like chronic bronchitis, asthma, chronic
obstructive pulmonary disease (COPD), allergies, bronchiectasis,
post nasal drip by rhinitis or sinusitis,
gastroesophageal reflux disease (GERD), medications like angiotensin converting enzyme inhibitor (ACEI), tuberculosis,inini heart failure,
pulmonary embolism etc.
Treatment depends on causes. Some investigations like CBC with ESR with Circulating eosinophil counts, HRCT of Chest, ECG, ECHO, Barium swallow test, skin prick test, RAST test, reversibility test, pulmonary function test etc to find out the underlying causes for persistent dry cough and then treat them accordingly. Some medications like antihistamines, Montelukast, Salbutamol, Doxophylline with or without antibiotics can be given as treatment protocol.
Take care. Hope I have answered your question. Let me know if I can assist you further.
Regards,
Dr. Zubayer Alam, General & Family Physician