Methods to improve the insufficient blood supply to the brain include general treatment, medication, and in severe cases, surgery. 1. General treatment: strengthen daily care, low-fat, low-sugar and low-salt diet, light diet, more green vegetables and fruits, and insist on proper exercise. 2. Drug treatment: anti-thrombotic drugs and cerebrovascular expansion drugs can be used for treatment, such as aspirin, clopidogrel, nimodipine, etc., which can increase the blood supply to the brain and alleviate the uncomfortable symptoms caused by insufficient blood supply to the brain. 3. Surgery: When the carotid artery is severely narrowed and the effect of medication is not good, surgery should be considered, such as carotid artery stenting. It is recommended that patients with insufficient blood supply to the brain go to the hospital in a timely manner, under the guidance of the doctor for standardized treatment, follow the doctor’s instructions to take medication, do not blindly use their own medication, so as not to cause adverse consequences.