Sickle cell anemia or sickle cell disease (SCD)is genetic health disorder of your red blood cells (RBCs). Usually, Red blood cells are in shape of a disc which gives them full freedom to travel via even smallest blood vessels in the body. However, with this disorder, the red blood cells shape abnormally like a crescent shape resembling a tool called sickle. This makes these red blood cells sticky & rigid prone to likely getting trapped in the small vessels which partially blocks or stops the blood from reaching different parts of your body. This condition can cause pain and damage of tissues.