A mass that appears behind the earlobe should be a normal lymph node if there is no pain. Since the lymph nodes are palpable behind the ear, due to the thin subcutaneous fat, they are about the size of a soybean, soft in texture, and have no pain or mild pain when pressed, and do not require treatment. If there is an enlarged mass behind the ear and it is very painful when pressed, or if it is accompanied by difficulty in opening the mouth, treatment is needed. It may be inflammation of the lymph nodes or it may be mumps. Lymph node inflammation is caused by bacterial infection, manifested as swollen lymph nodes, painful, and even red, swollen, and purulent surface, you can take oral antibiotics, such as cefixime or cefradine, which can generally subside in about 10 days of treatment, and the pain can be reduced. If it is caused by mumps, usually below and behind the earlobe, it is caused by a viral infection, accompanied by the patient’s difficulty in opening the mouth, during treatment you can take oral antiviral drugs, such as oseltamivir and in the process of treatment you need to take more rest, drink more water and enhance immunity.