Hair swelling and dizziness may be a sign of high blood pressure, insufficient blood supply to the brain, cervical spondylosis and other diseases. 1. Hypertension: hair swelling and dizziness may indicate hypertension. When blood pressure continues to rise without timely control, it can cause increased intracranial pressure and cerebral vasospasm, which leads to cerebral ischemia and hypoxia, making the head appear bloated and dizzy symptoms. In serious cases, headache, nausea and vomiting may occur. 2. Insufficient cerebral blood supply: hair swelling and dizziness may suggest insufficient cerebral blood supply, such as cerebral arteriosclerosis, cerebral infarction, intracranial tumors and other intracranial diseases, which can lead to narrowing of cerebral arteries due to obstruction and pressure, resulting in the symptoms of hair swelling and dizziness. 3. Cervical spine disease: hair swelling and dizziness may indicate cervical spine disease. For example, cervical disc herniation, cervical spondylolisthesis, etc., can lead to vertebral artery compression, brain ischemia and hypoxia, resulting in hair swelling and dizziness symptoms. There are a lot of symptoms that cause hair swelling and dizziness, so we suggest that patients seek medical attention in time to identify the cause and target treatment.