Fatigue is a feeling of constant exhaustion, sleep deprivation and lack of sleep resulting in tiredness throughout the rest of the day. Fatigue is a frequent symptom of many types of arthritis and related diseases. In fact, it is a sensation that can be expected after certain activities or at the end of the day. If you are fatigued, sleeping poorly is going to exert an important influence in the daily requirements of your life. It also induces forgetfulness and frustration. It will be harder to pay attention and you will feel restless. It is easily observable that relaxation will be difficult during your free time.