Male, 20 years old, recently developed pericoronitis of the wisdom tooth, with limited mouth opening and facial swelling.

Pericoronitis of the wisdom tooth is a common oral disease, which usually occurs when the wisdom tooth has not fully erupted. The gap between the gum and the tooth easily accumulates food debris and bacteria, leading to infection and inflammation. The patient's symptoms include limited mouth opening and facial swelling, typical manifestations of pericoronitis of the wisdom tooth, indicating that the inflammation has spread to the surrounding tissues.

The patient should visit the department of stomatology immediately, where the doctor will perform irrigation of the crown area, alternately flushing the blind pocket with hydrogen peroxide and normal saline to remove food debris and inflammatory secretions, followed by application of anti-inflammatory ointment. Under the guidance of a physician, antibiotics should be taken to control the infection. Additionally, mouth rinses such as compound borax solution and furacilin solution can be used to maintain oral hygiene. If pain is significant, medications such as ibuprofen or acetaminophen may be used for pain relief. If pericoronitis recurs frequently or a fistula that is difficult to heal has formed, removal of the wisdom tooth should be considered after controlling the inflammation.

During treatment, the patient should maintain good oral hygiene and avoid eating hard or hot foods to prevent worsening of symptoms. Furthermore, maintaining adequate rest and healthy dietary habits will aid in recovery. If other severe symptoms occur, prompt medical attention is necessary.