Sinusitis is a germ infection that causes inflammation and swelling in the tissues that surround the nose and ear. Some of its most common causes include immune deficiencies, allergies, infection from infected person, weather change, asthma etc. Sinusitis symptoms are somewhat similar to cold which makes it hard to differentiate between the two. Sinusitis symptoms include headache, stuffed and runny nose, low fever, cough, sneezing, thick nasal discharge, fatigue, congestion etc.