Even if you're not allergic, things like cold air, cigarette smoke, or strong perfumes can set off a hacking spell. Postnasal drip. When you're congested, mucus drips down from your nose into your throat and makes you cough. You can get postnasal drip from colds, flu, sinus infections, allergies, and other problems.

Why do I get cough easily?

Viruses and bacteria

The most common cause of a cough is a respiratory tract infection, such as a cold or flu. Respiratory tract infections are usually caused by a virus and may last from a few days to a week. Infections caused by the flu may take a little longer to clear up and can sometimes require antibiotics.

Why do I cough everyday for no reason?

Common causes include asthma, allergies, gastroesophageal reflux disease (GERD), or bronchitis. Less commonly, it can be a sign of a more severe condition, such as a heart cough or lung disease.