Acute and chronic sinusitis have different causes, different symptoms and different treatments. 1. Different causes: acute sinusitis is often caused by purulent bacterial infections such as pneumococcus and hemolytic streptococcus. Chronic sinusitis has a complex etiology, which is the result of genetic and environmental factors, and is related to bacterial infection, nasal cilia dysfunction, nasal anatomical abnormalities, etc. It can also evolve from acute sinusitis. 2. Symptoms are different: acute sinusitis is often manifested as nasal congestion, nasal cavity, a large number of purulent or mucopurulent nasal discharge, headache, etc., may be accompanied by fever. The clinical manifestations of chronic sinusitis are mainly nasal congestion, mucopurulent nasal discharge, mild swelling and pain in the head and face, olfactory dysfunction, and generally no generalized fever. 3. Different treatments: acute sinusitis is mainly treated with antibiotics such as cefaclor and cefoperazone, glucocorticoid nasal spray, such as mometasone furoate nasal spray; and saline nasal irrigation. Chronic sinusitis can be used budesonide and other nasal glucocorticoids; mucus drainage agents, such as eucalyptus-pin enteric soft capsule; nasal rinse; standardized treatment is invalid feasible nasal endoscopic surgery. Sinusitis patients should go to the hospital in a timely manner, under the guidance of the doctor early formal treatment to prevent further development of the disease.