Fever after a baby falls on the back of the head may be due to a cerebral contusion. Usually, cerebral contusion is mainly caused by head trauma, which may be related to violent blows, brain tissue deformation and shear stress. Patients often have impaired consciousness after the injury, and may also have headache, nausea, vomiting, dizziness and other symptoms of increased intracranial pressure, while some patients may also experience changes in vital signs, rapid pulse rate, persistent high fever and other phenomena. Fever can also occur if the baby falls on the back of the head and induces a cerebral contusion. At the same time, some patients may also be accompanied by depression, irritability and other adverse emotions, which may also be manifested as emotional and behavioral disorders. If the patient’s condition is more serious, it can also be combined with subarachnoid hemorrhage, photophobia, cervical ankylosis, hemiparesis, and sensory impairment. Fever after a baby falls on the back of the head may also have other causes, such as colds, etc. It is recommended to go to the hospital in time, complete the examination to clarify the cause of the disease, and then give targeted treatment or therapy.