Pain under the ear when pressed should be considered for acute mumps, inflammation of the lymph nodes behind the ear and trauma. Treatment should be based on the cause of the disease. 1. Acute parotitis: caused by viral infection, causing localized redness, swelling, heat and pain in the parotid gland under the ear, and the pain will be aggravated by pressing. In the aggravated stage, there will be pus that can flow out from the mouth of the catheter. Antiviral drugs, such as acyclovir, can be used under the guidance of a doctor. 2. Inflammation of lymph nodes behind the ear: Infection leads to low self-resistance, which causes the lymph nodes behind the ear to become enlarged, and the enlarged lymph nodes will become painful when pressed. Antibiotics such as penicillin can be used under medical supervision. 3. Trauma: If the lower part of the ear accidentally receives a violent impact, without skin breakage, but there may be damage to the soft tissue structure, resulting in the appearance of subcutaneous hematoma. Treatment of mild cases can be relieved on their own, serious cases are recommended to seek timely medical attention. There are other possibilities for pain below the ear when pressed, so we recommend that patients seek medical attention in a timely manner to clarify the cause of the disease and standardize the treatment.