What to do about post nasal drip cough?

Allergies . This could be allergies or sinusitis. Nasal steroids and nasal antihistines can be effective. Should start with your primary care doctor.
POST NASAL DRIP. Consult your physician about the cause of the post nasal drip (PND) and about treatment to stop this irritation to the respiratory tract. If the post nasal drip is the cause of the cough , and the PND is alleviated then the cough should clear. There are many causes of PND therefore an evaluation is necessary to get well.