Tip - How to Find Out if You Have a Sinus Infection

A sinus infection (also known as sinusitis) occurs when the sinuses become clogged with mucus, leading to bacterial or viral growth and infection. It causes cold-like symptoms, in addition to pressure behind the eyes, cheeks and forehead....
Tags: WikiHow, Find Out if You Have a Sinus Infection, wiki, how to articles, how to instructions, DIY, tips, howto, learn, how do I