Hi! There are two conditions regarding sinus infection. First is called acute sinusitis which means acute (recent) infection of sinus. It causes nasal discharge, nasal blockage and some time fever. In such condition, you should consult a doctor and doctor will give antibiotic and some anti-cold medicine and you will be all right. Second condition is called chronic sinusitis which means repeated attack of sinus infection. In such condition you have to consult ENT specialist who can find out the cause of your repeated sinus infection. It is equired because chronic sinusitis can cause complications like ear infection, throat infection, laryngeal infection,abscess formation near eye and some time it can cause meningitis. Take care.