Sinusitis is a condition that is described as having inflammation of one or more of the sinuses that drains into the nose; leaving the sinus infected or inflamed. Everyone has four sets of sinuses, and in children, the ethmoid sinuses, which are located just where the eyebrow meets with the cheekbone, are most commonly affected. The sinuses make up the holler air space within the bones surrounding the nose. The sinuses produce mucus that drains to into the nose, and when the nose is swollen, it blocks the sinuses from draining and thus causes pain and infection. Sinusitis can last for less than a month or can be chronic and last much longer. Sinusitis often starts as a cold but then turns into a bacterial infection. Allergies, pollutants, certain diseases and nasal problems can cause sinusitis. Symptoms include fever, congestion, cough, fatigue, yellow or green nasal drainage, headache, sneezing attacks and body weakness. (Source: American Rhinologic Society)