Obstructed wisdom teeth are one of the common diseases in dentistry, which can cause various clinical conditions such as pericoronitis, jaw cyst, osteomyelitis, etc., and seriously affect the life, study and work of patients. To determine whether the wisdom teeth are obstructed, the diagnosis can be clarified through clinical manifestations and auxiliary examinations. 1, clinical manifestations 1, food embedment: wisdom teeth after the occurrence of obstruction, the most common manifestation is food embedment, wisdom teeth and neighboring teeth are prone to food embedment, the need to use dental floss cleaning. 2, swelling, pain: after the occurrence of blockage of wisdom teeth, often accompanied by inflammation, there will be swelling of the soft tissues around the teeth, pain, serious cases produce overflowing pus, accompanied by facial swelling, mouth opening restrictions, and even intermittent or persistent pain radiating to the temporal region, neck, throat. If treatment is not taken in a timely manner, patients may experience bad breath, thickened tongue and other accompanying symptoms due to swelling, pain and restricted mouth opening in the later stages of pericoronitis. 3. Neighboring tooth injury: After the blockage of wisdom teeth, there is a gap or blind pocket between wisdom teeth and neighboring teeth, which can easily cause food embedding; after the blockage of proximal mesial oblique position, the crown tops the distal mesial surface of neighboring teeth, which can easily lead to the caries of neighboring teeth; due to the forward extrusion of neighboring tooth roots, clinical symptoms such as loosening of neighboring teeth, soreness and weakness of biting often appear. If the inflammation of the wisdom tooth occurs, after regular anti-inflammatory treatment, the swelling cannot subside, the oral X-ray can be taken to find the cyst shadow around the wisdom tooth, and it is clear that the wisdom tooth is obstructed, and treatment measures should be taken actively to avoid serious condition.