Heat in the back of the head is usually considered to be caused by high temperature, such as high ambient temperature or wearing a hat for a long time causing heat in the back of the head, which can be relieved after cooling treatment. In addition, the fever in the back of the head may also be caused by skin inflammation, brain problems and muscle spasm: 1, skin inflammation: such as the back of the head area sebaceous gland excretory duct obstruction, sebaceous gland cystic epithelium by the gradual increase in the contents of the filling, the formation of cysts, when sebaceous cysts secondary to the infection inflammation occurs, due to our own immune system against external stimuli to produce a defense reaction, can appear red, swollen, hot, Painful inflammatory reaction, thus causing fever in the back of the head; 2, brain problems: need to exclude cerebral vascular disease and organic lesions of the brain, cerebral vascular problems. Such as slight bleeding in the brain or subarachnoid hemorrhage, producing meningeal irritation sign, causing the tonus of the back of the head, there will be fever, headache, which will lead to fever in the back of the head; 3, muscle spasm: cervical spondylosis is usually accompanied by cervical vertebrae physiological curvature changes, which will lead to the tightening of the muscles in the neck, and the muscles at the back of the neck are in the state of spasm and contraction for a long time, which will cause the local obvious symptoms of fever, suffocation, and so on.