Swollen parotid lymph nodes are a common symptom in life and can be caused by a cold, stomatitis or mosquito bites. Patients with colds can be treated with anti-inflammatory drugs, such as acetaminophen, or Chinese medicines such as cold and fever pellets. Stomatitis patients need to clarify the type of stomatitis, and then targeted anti-inflammatory treatment, such as taking acyclovir, fluconazole, loratadine, etc., as prescribed by the doctor. Mosquito bites generally do not need to be treated and can disappear naturally with time. In the early stage of the disease, anti-viral drugs, such as ribavirin, can be used for treatment. If there are symptoms such as headache and parotid swelling, drugs such as ibuprofen can be used for treatment. Patients should pay attention to rest, isolation, and oral hygiene. 2. Parotid duct stones: There will be swollen and painful parotid lymph nodes with congestion and pus overflowing from the parotid ducts. If the stones are small, salivary agents can be applied to remove the stones, and ductal lithotomy is also feasible. If the stones are large, try ultrasonic lithotripsy for treatment; 3. Lymphatic epithelial disease: this disease can lead to swollen lymph nodes and can cause difficulty in swallowing, and can be accompanied by dry mouth and swollen tear glands and other symptoms. Painless mass at the parotid gland with soft and movable texture. Since there is no specific medicine for this disease, it should be removed surgically after the diagnosis is confirmed by histopathology and parotid imaging. The lymph nodes of the parotid gland should be removed after histopathology and parotid angiography. A review should be performed 6-12 months after surgery to understand the specific symptoms. If the diagnosis is septic parotitis, physical therapy such as ultrashort wave and infrared light can be applied under the guidance of a medical professional. If the diagnosis is confirmed as systemic lupus erythematosus, glucocorticoids such as methylprednisolone and prednisone can be used for treatment. If the diagnosis is confirmed as lymphoma, radiotherapy and chemotherapy are usually required. If it is caused by conditions such as metastasis of nasopharyngeal malignancy, it needs to be treated by surgery, radiotherapy, chemotherapy, immunotherapy, etc. according to the specific condition.