Many reasons: Among them: a viral infection, post nasal drip from allergies or chronic sinusitis, a throat infection, acid reflux, etc.
Answered 10/23/2017
5.3k views
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more.
Ask your question