Is dizziness when standing up a sign of anemia?
Nov 21, 2022
Source: Cainiu Health
Dr. Zhang Heyang
Introduction
Dizziness upon standing may be caused by anemia. Patients with anemia have lower numbers of red blood cells and reduced hemoglobin levels, which impairs the blood's ability to carry oxygen. This leads to decreased oxygen content and reduced blood flow, resulting in ischemia (inadequate blood supply) to various parts of the body. When the brain experiences ischemia, dizziness may occur. Upon suddenly standing up, there can be a temporary insufficiency of blood supply to the brain.
Generally, dizziness upon standing is caused by anemia. The specific analysis is as follows:
Patients with anemia have lower numbers of red blood cells and reduced hemoglobin levels, which impairs the blood's oxygen-carrying capacity. This leads to decreased oxygen content and blood flow, resulting in ischemia (inadequate blood supply) to various parts of the body. When the brain experiences insufficient blood supply, dizziness may occur. Particularly when standing up suddenly, a transient cerebral hypoperfusion (temporary reduction in blood flow to the brain) can cause noticeable dizziness. However, dizziness upon standing may also result from other causes, such as orthostatic hypotension. This condition mainly occurs due to a sudden change in body position, leading to a temporary drop in blood pressure and cerebral blood flow, thus causing dizziness.
If dizziness persists during daily activities and is accompanied by fatigue, it might be due to anemia. It is recommended to seek timely medical evaluation at a hospital, undergo relevant examinations—such as a complete blood count (CBC)—and follow the doctor’s advice for accurate diagnosis and targeted management or treatment. If the cause is iron-deficiency anemia, iron supplements should typically be taken under medical guidance, such as dextrans iron granules or protein succinate iron oral solution.
