9 Reasons You Wake Up Tired After A Full Night Of Sleep

Anemia
Iron-deficiency anemia is a common type of anemia that occurs if you do not have enough iron in your body. People with mild or moderate iron-deficiency anemia may not have any signs or symptoms. More severe iron-deficiency anemia may cause fatigue or tiredness, shortness of breath, or chest pain.People who are anemic most often experience fatigue. While it's normal to feel tired after a long day at work or a heavy exercise session, when you're anemic, you feel weary after shorter and shorter periods of exertion as your body's cells become starved for oxygen.