There are many clinical causes of headache and head swelling, and the common ones are as follows: 1. Too high blood pressure: If a patient has headache and head swelling, it may be due to too high blood pressure, which can cause headache and head swelling, especially when the blood pressure is higher than 200 mmHg. 2. Cervical spondylosis: It may be accompanied by other symptoms, such as dizziness and numbness of the limbs. 3. Poor rest and mental stress may transiently lead to headache and head swelling. Therefore, it is necessary to determine what causes headache and head swelling from various aspects, to clarify what causes it, and to give different treatments according to different situations.