The common causes of sudden pain in the top of the head are as follows: 1. It can be considered to be caused by cervical spondylosis, cervical cervical spondylosis can lead to insufficient blood supply to the cervical vertebral artery, which can cause sudden pain in the top of the head as the position of the neck changes. 2. Sudden pain in the top of the head can also be considered to be acute cerebrovascular lesions, clinically common subarachnoid hemorrhage or intracranial lobar hemorrhage due to trauma, which can cause sudden pain in the top of the head. 3. Sudden pain in the top of the head can also be considered as subacute infective endocarditis, which can cause bacterial aneurysm rupture, leading to cerebral hemorrhage or subarachnoid hemorrhage, and eventually leading to sudden pain in the top of the head. 4. Patients with hypertension can have cerebral vasospasm due to higher than normal blood pressure, which can also cause sudden pain in the top of the head. The symptoms of sudden pain on the top of the head can also occur.