Swelling of the face after filling is often an attack of acute periapical inflammation, which may be caused by misjudgment of the state of the pulp, requiring root canal treatment, or may be caused by parotid inflammation, requiring the use of medication or surgical treatment. 1. Periapical inflammation. When the tooth is too deeply decayed, it may cause reproducible pulpitis or irreversible pulpitis. Clinically, if the state of the pulp is misjudged or the inflammation of the pulp is changed from reproducible inflammation to irreversible inflammation, due to the closure of the inflammation drainage channel, acute periapical inflammation will occur in the tooth after the resin filling is carried out. After diagnosis, it is usually necessary to open the pulp to remove the infected pulp and then root canal treatment, and if necessary, the core crown repair. 2. Mumps. A good dental fillings swollen face may also be just the body resistance is low, there is a bacterial infection, causing parotitis, parotid area of the cheek swelling and pain, after diagnosis, need to follow the doctor’s instructions to use antibiotics such as amoxicillin, metronidazole treatment, the emergence of abscess, but also need to be surgically incised and drained. Swelling of the face after filling may also be other teeth inflammation coincidentally caused by swelling, such as other teeth with periapical periodontitis, radiography can be found, other teeth apical area with dark shadows, need to confirm the diagnosis of the affected teeth for root canal treatment, specific recommendations to the hospital to do oral examination and x-ray diagnosis and treatment.