The danger of sinusitis mainly lies in the discomfort caused by nasal congestion, nasal discharge, headache and other symptoms, as well as osteomyelitis, intracranial or intraorbital complications. 1. Symptoms: Sinusitis patients mainly with nasal congestion, pus, head and face pain, loss of smell as the main symptoms, some patients with aggravated condition, but also can cause chills, fever, and loss of appetite and other general symptoms. 2. Complications: nasal cavity, sinus and orbital, cranial and cerebral neighborhood, so its lesions can also spread through bone destruction, bloodstream infection, lymphatic infection, which leads to the emergence of osteomyelitis, which can lead to dull headache with stuffy swelling-like dull pain; Secondly, it can also induce orbital infection, which can lead to orbital septum anterior cellulitis, orbital subperiosteal cellulitis or abscess, etc., which can lead to the appearance of the patient’s protruding eyeballs, limited eye movement, loss of vision, and other uncomfortable symptoms. Severe cases can also induce intracranial complications, such as epidural abscess, subdural abscess, purulent meningitis, etc. If treatment is not carried out in time, it can affect the patient’s life. Once sinusitis occurs, it is important to pay attention to timely consultation and treatment in the hospital.