There are more causes of headache and dizziness, such as migraine, abnormal blood pressure, cardiovascular and cerebrovascular diseases. Different etiologies may involve different tests. Common tests include blood pressure measurement, fundus check, blood routine, head CT, etc. 1. Migraine: Migraine sufferers will have headache and dizziness, and the diagnosis will usually be clarified through laboratory tests, CT, transcranial Doppler ultrasound (TCD), MRI, electroencephalogram and other auxiliary tests. 2. Abnormal blood pressure: Both hypertension and hypotension will present with symptoms of dizziness and headache, and will usually be examined through blood routine, urinalysis, blood pressure monitoring and other tests in order to further clarify the diagnosis. 3. Cardiovascular and cerebrovascular diseases: Common cardiovascular and cerebrovascular diseases such as coronary heart disease and cerebral infarction can present with symptoms of headache and dizziness. Coronary heart disease may involve ultrasound, electrocardiogram, coronary artery CAT and other tests; cerebral infarction may undergo cerebrospinal fluid examination, coagulation function, cerebral CT, MRI, neurological and other tests. In addition to this, there are many other causes of headache and dizziness, such as meningitis, concussion, brain tumor, etc. The specific tests are different for different causes. If persistent headache, dizziness should be timely consultation, under the guidance of the doctor to improve the examination, targeted treatment.