Sinus screening requires a sinus CT, which costs about$300 and is done directly at the hospital. Sinus CT can mainly rule out sinusitis, sinus cysts or benign or malignant tumors of the sinuses. First of all, sinusitis is caused by inflammation and infection of the sinus mucous membrane congestion, edema, inflammation and exudation will cause patients with nasal congestion, yellow nasal discharge, headache, facial swelling and pain and other related symptoms. Acute sinusitis requires symptomatic anti-inflammatory treatment oral anti-inflammatory drugs, but also need to carry out sinus puncture rinse, repeated puncture twice a week, usually a month can be cured. Chronic sinusitis requires surgical treatment, which can be performed sinus open surgery or radical sinus surgery. Secondly, sinus cysts are mucous gland cysts or plasma cysts in the sinuses, and patients will occasionally have yellow nasal discharge, which is intermittent and recurring, and sinus CT can make a clear diagnosis, and if it is found, it is necessary to perform sinus cyst removal. Again malignant tumors of the sinuses, usually the patient will appear facial distension, yellow nasal discharge and accompanied by foul smell, need to take the pathology of the sinuses, after the diagnosis is confirmed, then need to carry out surgical treatment.