Head swelling from bending over and lowering the head may be related to the following reasons: 1. It may be caused by cervical spondylosis. For example, when sympathetic cervical spondylosis or vertebral artery cervical spondylosis strikes, it may be accompanied by symptoms of dizziness and head swelling. When bending over and lowering the head, the change in the position of the cervical spine may aggravate the symptoms of the above mentioned lesions. 2. It may be caused by high pressure inside the cerebrospinal fluid. This is often seen in patients with intracranial or spinal cord-related tumors or blockages in the path of cerebral fluid flow, resulting in high cerebrospinal fluid pressure. The patient’s bending low will aggravate the symptoms. 3, this situation may be caused by high blood pressure. If the patient’s blood pressure is too high, the process of bending down and lowering the head will cause the blood vessels in the head to become overly dilated, followed by head swelling. Finally, this condition may be caused by meningeal irritation signs. These lesions are often seen in patients with intracranial hemorrhage or tumors, which can lead to meningeal irritation. This irritation is exacerbated when the patient bends over and lowers his head.