Insufficient blood supply, generally insufficient blood supply to the brain and heart, can be judged by their own symptoms, it is generally not recommended to self-test, if you suspect that there is insufficient blood supply must go to the hospital to avoid serious consequences. Most of the insufficient blood supply is caused by atherosclerosis, some patients will have weakness, drowsiness, nausea and other obvious symptoms, but the insufficient blood supply to the brain is also accompanied by headache, dizziness and other symptoms, numbness of the limbs, impaired mobility, slurred speech and other symptoms, and even a short period of time loss of consciousness, blurred vision and other conditions. Insufficient blood supply of the heart is often accompanied by chest pain, stuffiness and other discomfort, mostly triggering factors, the duration of the general within a few minutes, rest or sublingual nitroglycerin tablets can be relieved to varying degrees, the specific need to go to the hospital to check the diagnosis of laboratory tests. In addition, insufficient blood supply should also be identified with hypoglycemia, low blood pressure and other diseases. The occurrence of insufficient blood supply generally indicates that pathological changes have occurred in the body, and it is necessary to consult a doctor in time for examination and treatment, and it is not recommended that patients carry out self-tests to avoid delaying the condition.