A hard pack grew on the back of the head what reason causes pain when pressed

A hard pack on the back of the head is painful for the following reasons: 1. Ask the patient if there is any trauma, especially a history of head trauma. If the head is on the ground, it is easy to show a hematoma under the scalp and show a hard pack on the back of the head. 2. If there is a hard pack on the back of the head, check whether the patient has redness or fever around the skin. For example, folliculitis patients because of pore blockage, it is easy to cause inflammatory reactions around, its performance as a hard pack a press there is pain feeling. Can go to the hospital to do blood tests, understand whether there is an increase in white blood cells. 3, but also pay attention to whether there is a decline in body resistance, purulent infection will cause scalp hard pack.