Definition: Anemia is a common condition affecting many people around the world. Anemia is a Greek word meaning "without blood." The modern definition of anemia is any condition characterized by an abnormal decrease in the body's total red blood cell mass. It is also defined as a condition in which a person has fewer red blood cells than normal and feels very weak and tired. Causes of anemia: The causes of anemia are all related to red blood cells (RBCs). It is mainly caused by reduced production of red blood cells or increased destruction of red blood cells and is caused by blood loss and fluid overload. The most common cause of anemia is blood loss, although this has no permanent symptoms. Excessive blood loss can be caused by stomach ulcers, hemorrhoids, stomach inflammation, cancer, certain medications, childbirth, menstruation, surgery, and trauma in accidents. Immune reactions, certain drugs, infections, medical procedures, and toxins, such as using a heart-lung bypass machine or hemodialysis, can cause hemolysis. Diet and hormones also play a key role in the development of anemia. A diet lacking iron, vitamin B12, or folic acid can prevent the body from producing enough red blood cells. Symptoms of the disease: When you suffer from anemia, the symptoms are not evident early. The symptoms of anemia depend on the condition or cause of the anemia. Lethargy and tiredness are the most common symptoms of anemia and the most pronounced. Lethargy is a mental condition in which a person does not feel like working and tiredness is a physical condition in which a person feels that he does not have enough energy to work. Other symptoms include malaise (feeling unwell), dyspnea (shortness of breath; labored or difficult breathing), poor concentration, palpitations, and sensitivity to cold temperatures. Treatment of the disease: Anemia is diagnosed through a blood test and once The doctor identifies the cause of the anemia and several treatment options are available. Treatments may include dietary changes or supplements, medications, procedures, or surgery to treat blood loss. The goal of treatment is to change the amount of oxygen the blood can carry.