Anemia is easy to fatigue. 1. Anemia will cause a decline in the oxygen-carrying capacity of human tissues, the body’s metabolic capacity will be reduced accordingly, resulting in a lack of nutrients in the body of the patient with anemia, decreased muscle tissue tone, a movement will be sore and weak. 2. Anemia also leads to ischemia and hypoxia of brain tissue, which leads to poor concentration, easy fatigue and drowsiness during mental work. Therefore, patients with anemia are prone to weakness, fatigue, shortness of breath after activity, palpitations (rapid heartbeat, often accompanied by panic), dizziness, etc., of which fatigue is the most common. Anemia can be seen in hematological disorders such as iron-deficiency anemia, retroviruses, and leukemia, as well as in immune system disorders such as systemic lupus erythematosus, and also in liver diseases and hemorrhage. If a patient develops anemia, it is recommended that the cause be identified and standardized treatment be carried out as early as possible under the guidance of a physician to reduce the adverse effects of the disease.