Patients with maxillary sinusitis may suffer from nasal congestion, impaired sense of smell, runny nose, etc., which affects normal life; complications such as orbital cellulitis may also occur. 1. Nasal congestion: maxillary sinusitis may lead to congestion and swelling of the mucous membrane in the nasal cavity, resulting in increased mucus in the nasal cavity, which leads to poor ventilation in the nasal cavity, resulting in nasal congestion. 2. Olfactory impairment: maxillary sinus mucositis may also lead to pus accumulation in the nasal cavity, as well as turbinate swelling may lead to olfactory dysfunction. 3. Runny nose: Acute maxillary sinus mucositis may lead to the appearance of a large amount of plasma nasal discharge, similar to a cold. If there is pus in the nasal cavity, the nasal mucus is thick and pus-like, and the amount is small. The snot may also flow backward into the pharyngeal cavity, which may cause sore throat and cough. 4. Complications: When the infection is serious, it can cause osteomyelitis, orbital cellulitis, meningitis and other diseases, and even life-threatening. Maxillary sinusitis patients, should follow the doctor’s instructions standardized treatment. Strengthen the daily fitness exercise, enhance physical fitness, improve immunity. Improve the living environment, wear a mask to reduce dust inhalation to avoid recurrence.