There are many reasons for the swelling and pain inside the head of patients, and we should pay attention to the form of the onset of the disease and the accompanying symptoms to analyze: 1. When the blood pressure is elevated, the symptoms of head swelling and headache will appear, because when the blood pressure is high, it will lead to the expansion of the blood vessels of patients, which will stimulate the pain-sensitive structures in the brain, and patients will show the head swelling and pain. 2. If a patient has a headache, a migraine attack, or occipital neuralgia, the patient will also experience swelling and pain in the head. 4. If the swelling and pain in the head persists and gradually worsens, it is considered to be caused by intracranial tumors or intracranial occupying lesions.