There are many causes of swollen and painful cheeks, including mumps, swollen gums, oral diseases such as dental caries, swollen local lymph nodes, upper respiratory tract infection, otitis media, etc. When this happens, you must go to a regular hospital as soon as possible and undergo relevant examinations, including routine blood tests, ultrasound examination of the parotid gland or dental radiographs, to clarify the cause of the disease and then actively treat it symptomatically. If the patient is suffering from mumps, isolation treatment should be carried out. No matter which disease is mentioned above, it is necessary to strengthen oral care, keep oral hygiene, and pay attention to diet, eat liquid or soft food, avoid chewing harder food, and also drink more water and rest, which is conducive to the early recovery of the organism.