Anything that causes: congestion, can lead to sinusitis. Most times it starts with a viral upper respiratory infection, or sometimes with an allergy. If the fluid sits in the sinuses, it is a good enclosed space for bacteria to grow, leading to a sinus infection(sinusitis). It is not contagious to others.
Answered 12/20/2014
3.4k views
A doctor has provided 1 answer
3 doctors weighed in across 2 answers
5 doctors weighed in across 2 answers
7 doctors weighed in across 4 answers
7 doctors weighed in across 4 answers
90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more.
Ask your question