Sinus infection that persists more than eight weeks is referred to as chronic sinusitis. It may follow an acute sinus infection that fails to clear completely with treatment. Another common situation is a patient who has recurrent bouts of sinusitis. If you have more than four episodes of sinusitis per year, it is termed chronic sinusitis. Additionally, if you seem to have sinus symptoms for many months and even years, this too is chronic sinusitis. People who have chronic sinusitis need further evaluation and treatment in order to avoid future flare-ups and improve their quality of life.
 

Sinuses Involved in Infection

If you have pain between your eyes, if pain is worse with eyeglasses on, Then you have Ethmoid Sinusitis

If you have pain over your cheekbone, pain like a toothache Then you have Maxillary Sinusitis

If you have pain that is severe and over your forehead  
Then you have Frontal Sinusitis

If you have pain that is deep-seated, from many areas, including behind your eyes, at the top of your head, and at the nape of your neck 
Then you have Sphenoid Sinusitis

 
The most frequent symptom of chronic sinusitis is postnasal drip, with thick mucus in the back of the nose or throat. As it drips into the lower throat onto the vocal cords, or even into the windpipe or bronchial tubes, it may trigger a cough. The resulting cough is most apparent in the morning, when waking, and at night. Thinner, watery postnasal drip may indicate allergies. Postnasal drip may lead to a bad taste in the mouth or bad breath. Dull facial pressure and headache are also common, causing many chronic sinus patients to take daily analgesics, like aspirin or Tylenol.

Another common symptom of chronic sinusitis is nasal congestion or blockage. You may be aware of decreased air passage on one or both sides of your nose. Nasal congestion may extend to the eustachian tubes. This results in ear fullness and occasionally impacts hearing. While some people with chronic sinus infections become run-down and fatigued, fever is uncommon. One of my patients was diagnosed with and treated for chronic fatigue syndrome for two years. After I operated on his sinuses and drained them of thickened mucus, which had accumulated over years, he felt renewed energy and no more fatigue.