Blocked blood vessels refer to blocked arteries. Symptoms of arterial blockage vary depending on the location and severity of the blockage. If the blockage is in the brain, it is a symptom of cerebral infarction. Patients may experience hemiparesis of the opposite limb, slurred speech, etc. If the blockage is in the coronary artery of the heart, it is a symptom of angina pectoris and myocardial infarction. Patients may experience chest tightness and chest pain. If the blockage of the artery is in the kidney, it is a symptom of kidney infarction. The main symptoms are back pain, abdominal pain, nausea and vomiting, decreased kidney function and high blood pressure. If the blockage site is peripheral vascular, it mainly causes ischemic symptoms in the limbs. From early to late stages, numbness of the limbs may occur, skin temperature may decrease, skin color may be somewhat pale or cyanotic, or walking activities may show intermittent claudication and walking distance may be slowly shortened. Some people may feel soreness and pain in the limbs, and later on, as the ischemic symptoms worsen, ischemic necrosis, gangrene or ulceration of the terminal limb may occur. Symptoms of arterial vascular blockage manifest as ischemic manifestations in organs or tissues, which are related to the site of blockage and organ function, and usually manifest with pain and organ dysfunction.