There are many reasons why a lump below the earlobe is painful to touch, the common ones are: mumps, acute non-specific lymphadenitis, sebaceous cysts in secondary infections and so on. 1. Mumps: caused by mumps virus infection, with non-suppurative swelling and pain in the parotid gland as the main feature, the onset of the earlobe as the center gradually forward, backward and downward, and pear-shaped lumps appear below the earlobe, and there is obvious swelling and pain and local burning. 2. Acute non-specific lymphadenitis: mainly caused by pathogen infection, if the onset of the site in the lymph nodes below the earlobe, lymph node enlargement, local redness, swelling and pain, tenderness and other symptoms will appear in a short period of time. 3. Sebaceous cysts secondary to infection: Sebaceous cysts may be caused by a large accumulation of sebaceous glands below the earlobe. Sebaceous cysts are lumps adhering to the skin, which will be painful to touch when secondary to bacterial infection. Patients need to go to the hospital in time to find the cause of the disease, and under the guidance of the doctor for treatment, if you need to use to prescription drugs, should follow the doctor’s instructions.