When pathogenic micro-organisms attack your sinus, the resulting condition is called sinusitis. It can be a viral, fungal or bacterial attack. These microbes grow in the sinus causing blockage, inflammation and infection. The following are the major symptoms observed in patients having sinusitis:

• Pain and Tenderness – The pain and tenderness in the infected sinus area are often felt by patients as throbbing. This throbbing can get worse when the head is bent forward during any activity. Further, such patients have reported having pain while chewing food.
• Blocked Nose – The nasal tract may get blocked if you have sinusitis. Patients may have both the sides of their nose blocked. Some have reported even loss of the sense of smell for a while.
• Runny Nose – Runny nose is a major symptom of sinusitis even though it can be the symptom of other diseases as well. One should be cautious if the discharge of the nose is unusually greenish or yellow. This is a sign of bacterial infection and immediate medical attention should be sought.
• High Fever – The body reacts to an infection with high fever. So, if the fever is high combined with other symptoms, it is likely that you have a sinus infection.
• Headache – Severe headache accompanied with bad breath, toothache, cough, pressure or fullness in the ears and tiredness are other symptoms of sinusitis.
• Discomfort – Irritability and discomfort in the ear along with snoring, mouth breathing, feeding difficulty and nasal speech can be signs in children if they have sinusitis.
• Aggravated Pain – If the pain or tenderness gets worse even after the runny nose stops, it could be a sign of sinusitis. The runny nose stops because the drainage channels are blocked by thick mucus. See the doctor immediately.