1, more pus: nasal mucus is mostly purulent or mucopurulent, yellow or yellow-green, the amount of variable, more flow to the throat, unilateral odor, mostly seen in odontogenic maxillary sinusitis; 2, nasal congestion: varying severity, mostly due to congestion and swelling of the nasal mucosa and increased secretions, nasal congestion can often lead to temporary olfactory impairment; 3, headache: chronic purulent sinusitis generally obvious local pain or headache. If there is a headache, often manifested as a dull pain or head heaviness, heavy during the day, light at night. The anterior group of sinusitis mostly shows forehead and nasal root distension or dull pain, while the headache of the posterior group of sinusitis is in the top of the head, temporal or posterior occipital region. When suffering from odontogenic maxillary sinusitis, it is often accompanied by ipsilateral upper row toothache; 4. Other: Due to the flow of pus into the pharynx and long-term breathing with the mouth, it is often accompanied by chronic pharyngitis symptoms, such as sputum, foreign body sensation or dry and painful pharynx. If it affects the eustachian tube, there may also be tinnitus, deafness and other symptoms.