There are several reasons for severe ischemia in the body: 1. it may be caused by the patient’s blood weakness; 2. it may be caused by the patient’s presence of anemia, and the anemic patient’s hemoglobin will have a significant decrease, which will then cause the patient to feel weak; 3. it may be caused by the patient’s presence of low blood pressure, or it may be caused by the patient’s presence of heart disease, such as myocardial infarction, atherosclerosis, heart failure, etc. 4, may be caused by the presence of bone marrow hematopoietic disorders, such as leukemia and other malignant diseases, or may be caused by insufficient hematopoietic materials, such as megaloblastic anemia, iron deficiency anemia and other causes; 5, may be due to the presence of hemorrhage, it is recommended that patients go to the hospital for examination and treatment after diagnosis of the cause, patients in daily life, you can properly The patient can exercise in daily life to promote blood circulation, and can also take blood tonic drugs such as wolfberry and red dates.