Fever on the top of the head may be caused by high temperature, or it may be caused by upper respiratory tract infections, autonomic disorders, contact dermatitis and other diseases. 1. Excessive temperature: If you stay in an environment with excessive temperature for a long time, which leads to an increase in the production of heat in the whole body, you will be prone to head fever. 2. Upper respiratory tract infection: this disease is mainly caused by viral infections such as parainfluenza virus and adenovirus, followed by bacterial infections such as hemolytic streptococcus and streptococcus pneumoniae, which can be triggered by factors such as decreased immunity and vitamin deficiency, resulting in nasal congestion, fever, headache, malaise and other symptoms, and some patients will develop fever in the head. 3. Autonomic disorder: the occurrence of this disease is related to genetics, gender, abnormal nutritional metabolism, excessive life stress, long-term mental tension and other reasons, the patient will have fever, dizziness, headache and other symptoms, which can be manifested as fever in the head. 4. Contact dermatitis: this disease is caused by contact with allergens, commonly found in toiletries, animal dander, hair dyes, etc. As patients feel localized itching, burning, swelling and pain in the skin, fever on top of the head will occur. There are many causes of fever on the top of the head, and you should go to the hospital and do relevant examinations to clarify the cause.