If there is an occupying tumor lesion in the posterior cranial fossa, when the patient lowers his head, strains to defecate or coughs, or is emotionally agitated, it will cause the patient’s intracranial pressure to rise, which will lead to the aggravation of the headache. The second aspect is that the pain in the back of the head occurs when the patient exerts himself, the negative pressure of the body is increased, and the abdominal pressure is also increased, which will also lead to a corresponding increase in the intracranial pressure of the patient, and the patient will also experience pain in the back of the head. The third aspect is that during the period of lack of sleep, exertion or cold or fever, exertion will also stimulate the fascia of the scalp, which will also cause pain in the back of the head.