If the patient is a young and middle-aged person and the brain ultrasound shows increased blood flow, it is considered to be caused by vasospasm, which can generally be seen in patients with poor rest, headache and mental stress, and the ultrasound shows increased blood flow after vasospasm. It is recommended that the patient pay attention to rest, take oral medication to relieve vasospasm, and review the ultrasound results in a week or two weeks to check the change in blood flow rate. The second type of ultrasound shows increased blood flow speed. If the patient is middle-aged or elderly, it is considered to be due to atherosclerosis, which leads to thickening of the inner wall and narrowing of the lumen of the blood vessels. If necessary, you can take oral medications to protect the intima, such as statin lipid-lowering drugs.