A hard pack behind the earlobe that is painful when touched is more commonly caused by an infection caused by a sebaceous cyst, or it may be caused by a tumor. A sebaceous cyst is a benign tumor with a high probability of recovery. Hard pockets are usually painless when not touched or pressed, and produce pain or even pus when pressed. Patients can determine the cause through routine blood tests and puncture, check for inflammatory reactions, take antibiotics for treatment at the same time, and remove the tumor through surgery when the inflammation is relieved and the conditions for surgery are met. The hard pack in the earlobe may also be caused by the metastasis of tumor in other parts of the body, which will also have painful sensation, and patients can determine the cause through relevant examination and carry out rescue treatment.