Anemia refers to the hemoglobin is lower than the normal value range, and hemoglobin mainly plays the role of transporting oxygen, long-term anemia leads to long-term hypoxia in various tissues and organs of the organism, a series of damages may occur; the common ones are damage to the central nervous system, digestive system, and heart damage. 1. Damage to the central nervous system: the brain is the organ that consumes the most oxygen in the whole human body, and it is also the most sensitive and the least tolerant to hypoxia. Long-term hypoxia may lead to dizziness, headache, tinnitus, blurred vision, memory loss and inattentiveness, and other symptoms. 2. Digestive system damage: long-term hypoxia leads to a decrease in the secretion of digestive juices by the digestive glands, which can cause indigestion, loss of appetite, and changes in the character and regularity of stools. 3. Heart damage: Long-term ischemia and hypoxia of the heart may cause thickening of myocardial fibers and myocardial remodeling, which may lead to arrhythmia and other secondary problems; palpitations, chest tightness and shortness of breath may occur. It can be seen that long-term anemia is harmful to the organism is huge, so when you find anemia must be treated in time to avoid adverse consequences.