Left cheek pain may be caused by inflammation of wisdom teeth, mumps, temporomandibular joint disorder and other conditions. 1. Inflammation of wisdom teeth: usually due to the lack of space for growth of wisdom teeth, improper position of wisdom teeth, and retention of food debris. Patients often have symptoms such as swollen and painful gums, maxillofacial congestion and edema, and some patients may also have pain in the left cheek. Some patients may also have difficulty swallowing and limited mouth opening. 2. Mumps: It is usually caused by mumps virus infection and is also related to factors such as unsatisfactory vaccination effect and incomplete immune function. Most patients do not have obvious prodromal symptoms, a few patients may have headache, muscle pain, cold and other symptoms, and patients will also appear in 1~2 days after the symptoms of parotid swelling and pain, can also be accompanied by parotid gland enlargement, localized burning and so on. 3. Temporomandibular joint disorder: the cause of the disease has not been fully elucidated, and it is considered to be related to a variety of factors such as poor occlusion, psychology, internal and external joint trauma, bad habits and so on. Patients often have pain or joint popping sound when opening and closing the mouth, and may also be accompanied by pain in the temporomandibular joint area, jaw movement limitation, etc., and part of the patient’s pain can be extended to the half side of the face. It is recommended that patients with symptoms of left cheek pain should follow the doctor’s instructions to find out the cause of the disease and take reasonable treatment.