Ongoing fatigue affects quality of life and state of mind. Most of the time fatigue can be traced to one or more lifestyle issues, such as poor sleep habits or lack of exercise. Fatigue can be caused by a medicine or linked to depression. Sometimes fatigue is a symptom of an illness that needs treatment., Sleep disorders. Fatigue can be caused by sleep disorders. A sleep study can determine if your rest is being disturbed by disorders such as obstructive sleep apnea, restless legs syndrome or insomnia. Other medical problems. Fatigue is a common symptom in several medical conditions, such as anemia, diabetes and underactive thyroid. Lab tests can check your blood for evidence of some of the top , Fibromyalgia is a long-term condition that involves widespread body pain. The pain happens along with fatigue. It also can involve issues with sleep, memory and mood. Researchers think that fibromyalgia affects the way the brain and spinal cord process painful and nonpainful signals. That increases your overall sensitivity to pain. Symptoms often start after a triggering event. Triggers can , Most people with cancer have fatigue. Find out what cancer-related fatigue feels like and when it's concerning. Learn ways to cope with fatigue., The repeated awakenings associated with sleep apnea make typical, restorative sleep impossible, in turn making severe daytime drowsiness, fatigue and irritability likely., At my recent chemo teach they explained that the fatigue and recovery will follow a pattern and you will be able to predict what days will be good or bad and be able to make plans accordingly. There's a lot of information and I found it overwhelming the first time..