There are certain problems that restrict proper functioning of blood like platelet disorders, anemia, blood cancers and bleeding problems. All of these come under 'blood disorders' (also called Hematologic diseases). It can either be due to a hereditary disorder, or some other disease. It causes change in the levels of blood cells and platelets. These conditions are identified by pale skin, swollen lymph nodes, blood clots and formation of blood blisters in the mouth. Fatigue, rapid heartbeat, shortness of breath and muscle weakness are the most common symptoms of these disorders. With proper medications and surgeries, these problems can be resolved.