Tiredness can interfere with normal life. Lack of sleep, of course, is one of the main reasons for feeling tired all the time. However, there are many other lifestyle issues that can make you feel tired and exhausted. If you are getting enough sleep and yet feeling exhausted, there can be myriad reasons for this unexplained fatigue. In some cases, fatigue may be caused due underlying medical condition like thyroid disease, diabetes, anemia, heart disease and obesity etc. but some lifestyle issues like overwork, nutritional deficiencies, stress, anxiety and depression, obesity, inactivity and excessive caffeine use can also be the cause of your unexplained fatigue. In general, the patient’s routine and habits like sleep deprivation, eating unhealthy junk foods, not exercising at all can also make a person feel tired. Getting your energy back is easy, if you know why you are feeling drained. Here are 8 reasons why you feel exhausted all the time. Relate to them and improve the quality of your life by working on the simplest fixes like your diet, your sleep and your physical activities.