Common causes of insufficient blood supply to the brain include cranial atherosclerosis, vertebral artery cervical spondylosis, and heart failure. Insufficient blood supply to the brain can be relieved by adjusting lifestyle, medication, surgery and other ways. 1. Craniocerebral atherosclerosis often invades the internal carotid artery and vertebral artery. Atherosclerotic plaques can lead to narrowing of the lumen of blood vessels, thus leading to insufficient blood supply to the brain. Cerebral blood supply insufficiency can be alleviated by adjusting lifestyle (e.g. quitting smoking and drinking, regular work and rest, etc.) and applying cerebral vasodilating drugs such as vincristine as prescribed by the doctor. For those with severe cerebral blood supply insufficiency, stent implantation can be performed under the guidance of a doctor. 2. Vertebral artery-type cervical spondylosis refers to the compression of the vertebral artery due to degeneration of the cervical intervertebral disc and its secondary changes, which leads to a decrease in the blood flow to the brain through the vertebral artery, resulting in insufficient blood supply to the brain. Cervical traction, cervical braking or decompression surgery can be performed under the guidance of a doctor to alleviate the insufficient blood supply to the brain. 3. Cardiac insufficiency in patients with heart failure leads to a decrease in cardiac output, causing insufficient blood supply to the brain. Diuretics (e.g. furosemide, etc.), beta-blockers (e.g. furosemide, etc.) and other medications should be applied under the guidance of the doctor to actively treat heart failure, thus alleviating the cerebral blood supply insufficiency. If patients have cerebral blood supply insufficiency, they should consult the doctor in time to clarify the cause of the disease and carry out standardized treatment under the doctor’s guidance, so as to avoid delaying the condition and causing adverse consequences.