If you smoke, you need to stop. Talk to your doctor about using nicotine patches, gum, inhaler or nasal spray, or another method to stop smoking. Allergies Postnasal drip caused by allergies can cause a cough. Postnasal drip is mucus that runs down your throat from the back of your nose. Ask your doctor or pharmacist to help you choose one.
Some medicines can cause chronic cough in some people.
Call your doctor's office to find out if any of the medicines you use could cause you to cough. If you are taking a medicine that can cause you to cough, your doctor might be able to prescribe another medicine for you. Don't stop taking a prescribed medicine unless your doctor tells you to. Asthma Coughing can be a sign of asthma. In some people with mild asthma, a cough is the only symptom.