Sleep deprivation. Sleep deprivation is the condition of not having enough sleep; it can be either chronic or acute. A chronic sleep-restricted state can cause fatigue, daytime sleepiness, clumsiness and weight loss or weight gain. It adversely affects the brain and cognitive function.
Because most inflammatory forms of arthritis are systemic (meaning they affect the entire body), other symptoms related to inflammation may occur in other parts of the body. Depending on the specific form of arthritis, these symptoms could include skin rashes, eye inflammation, hair loss, dry mouth and fever.
One major indirect cause of pain in arthritis, fibromyalgia, is also one of the biggest causes of fatigue. Having arthritis may increase your risk of other health problems, such as heart and lung disease and other autoimmune diseases, including autoimmune hypothyroidism, which can be associated with fatigue.