Patients with sieve sinusitis are mainly characterized by nasal congestion, headache, pus flow, visual impairment and other symptoms. 1. Nasal congestion: mostly persistent, caused by inflammatory swelling of nasal mucosa and secretion accumulation, which may be accompanied by temporary decrease or loss of sense of smell. 2. Headache: heavy during the day, light at night, usually favoring one side, if more than one side of the pain must be heavier on one side, the pain can be aggravated in the low position of the head, coughing, exertion. 3. Pus flow: there is a large amount of pus or mucopurulent nasal mucus in the nasal cavity, with a little blood, the pus can flow back to stimulate the pharynx and larynx, triggering nausea, coughing, itching, coughing up phlegm and other symptoms. 4. Visual impairment: mostly seen in patients with posterior sieve sinusitis, caused by inflammation involving the optic nerve and the orbit, which can be manifested as vision loss, eye displacement, diplopia, blindness and other symptoms. In addition, patients with acute sieve sinusitis may be accompanied by chills, fever and other discomforts, and patients with chronic sieve sinusitis may be accompanied by fatigue, dizziness, mental weakness and other symptoms. When patients have the above symptoms and suspect the existence of sieve sinusitis, they should consult a doctor in time to improve the relevant examinations, such as sinus CT, nasal secretion examination, blood test, etc., so as to clarify the diagnosis of the disease and avoid blind judgment, so as to avoid delaying the condition.