The other causes needed to be ruled out are airway malacia, laryngotracheobronchitis and infection
with Chlamydia trachomatis. If there is presence of sputum with cough
then we can suspect the infection.
You need to undergo certain tests like allergen test, spirometry, and serological test for Chlamydia.
Treatment includes cough suppressants, a trial therapy with bronchodilators, avoiding triggering factors.