Hypotension and anemia by themselves do not evaluate which is more serious, and both severe hypotension and severe anemia can cause death of the patient. Hypotension is a state in which the arterial pressure in the body circulation is lower than normal. The cause and form of onset can be divided into acute hypotension. For acute hypotension, there is often ischemia of the heart, brain, kidneys and other important organs, and symptoms such as dizziness, black eyes, limb weakness, cold sweat, palpitations, oliguria, etc. Severe hypotension can manifest as syncope or shock, and severe hypotension is life-threatening to a person. Anemia is a common clinical condition in which the volume of peripheral blood cells is reduced below the lower limit of normal. The severity of symptoms depends on the speed of anemia, the degree of anemia and the compensatory capacity of the body, and when the speed of anemia is fast, the degree of anemia is heavy and the compensatory capacity of the body is insufficient, it often causes death.