Parotid swelling for 2 years, may be parotid tumor, chronic parotitis and so on. 1. Parotid tumor: often occurring on one side, mainly a local gradually enlarged mass in the parotid gland, benign tumors grow relatively slowly; malignant tumors usually grow faster, and can be accompanied by numbness, pain, or facial paralysis and other symptoms. Surgery is needed. 2. Chronic parotitis: it mainly manifests unilateral or bilateral, repeated enlargement of the whole parotid gland, salty taste in the mouth, accompanied by swelling after meals, facial fever and other symptoms. It is recommended that the hospital examination, a clear diagnosis, to exclude stones, foreign bodies and other causes, and then to be anti-inflammatory or surgery and other symptomatic treatment. It is recommended to go to a regular hospital stomatology consultation, by the physician examination after a clear diagnosis, so as not to delay the condition.