4. Celiac Disease
Celiac disease is when the body cannot process gluten appropriately. People who suffer from celiac disease often feel fatigued and are also more likely to experience sleep disorders. When celiac disease is left untreated it can cause the small intestine to become damaged.
When the small intestine is damaged it can result in mineral and vitamin deficiencies. This may lead to fatigue as well. Some of the other common symptoms of celiac disease include diarrhea, anemia, bloating, and weight loss.
As you can see, when it comes to feeling tired all the time, there are many different things that can be going wrong in the body. This is why it is important to make sure that you discuss this symptom with your doctor in order to determine the underlying cause. Any of the diseases on this list need to be treated appropriately in order to avoid further health issues over the long term.