A lump of flesh on the back of the head may be trauma, lymphadenitis, lipoma and other conditions. 1. Trauma: the back of the head long lump of meat may be related to trauma, such as collision, fall, car accidents, consider that may be the local production of subcutaneous hematoma. At this time, the texture of the touch is soft, and will be gradually absorbed. 2. Lymphadenitis: If the lump of meat on the back of the head is hard to touch and accompanied by obvious pain, or even redness and swelling, it may be related to lymphadenitis, such as bacterial infection. 3. Lipoma: If the edge of the back of the head is clear, soft to the touch, no pain, no skin redness and swelling, it can also be considered to be related to lipoma. Generally will not disappear on their own, need to be treated under the guidance of a doctor, if necessary, can consider surgical excision treatment. In addition, it may also be sebaceous cysts, scalp boils (scalp sores) and other conditions. It is recommended that the patient go to the hospital, complete the examination, make a clear diagnosis, and then follow the doctor’s instructions to be disposed of accordingly.