Children fall head fever at night, trauma generally does not cause fever, but if the situation is more serious, it may be combined with scalp hematoma, infection and other factors cause fever at night. 1. Due to the child after a serious fall can cause scalp hematoma, scalp hematoma in the rupture of red blood cells produced by the material, need to be absorbed by the blood into the brain, thus stimulating the body heat center leading to fever. 2. Children may also be triggered by head infections after a fall, while children due to shock, nervousness and other emotions caused by the body’s immune system to decline, it is easier to aggravate the degree of infection, which leads to body fever. In addition, it can not be ruled out that children’s own thermoregulatory center is not mature, easy to trigger dysfunction after the fall and thus produce body fever, so when the children fall after the head can be timely medical treatment to take targeted treatment.