Everyone feels tired now and then. Sometimes you may just want to stay in bed. But, after a good night's sleep, most people feel refreshed and ready to face a new day. If you continue to feel tired for weeks, it's time to see your doctor. He or she may be able to help you find out what's causing your fatigue and recommend ways to relieve it.
Fatigue itself is not a disease. Medical problems, treatments, and personal habits can add to fatigue. These include
- Taking certain medicines, such as antidepressants, antihistamines, and medicines for nausea and pain
- Having medical treatments, like chemotherapy and radiation
- Recovering from major surgery
- Anxiety, stress, or depression
- Staying up too late
- Drinking too much alcohol or too many caffeinated drinks
One disorder that causes extreme fatigue is chronic fatigue syndrome (CFS). This fatigue is not the kind of tired feeling that goes away after you rest. Instead, it lasts a long time and limits your ability to do ordinary daily activities.
NIH: National Institute on Aging
- Cancer Fatigue: Why It Occurs and How to Cope (Mayo Foundation for Medical Education and Research) Also in Spanish
- Fatigue (PDQ)-Patient Version (National Cancer Institute) Also in Spanish
- Fatigue and Multiple Sclerosis (National Multiple Sclerosis Society)
- Fatigue Fighters in Sjogren's Syndrome (Sjogren's Syndrome Foundation) - PDF
- Is Fatigue a Common Crohn's Disease Symptom? What Can Be Done about It? (Mayo Foundation for Medical Education and Research) Also in Spanish
- corticosteroid-binding globulin deficiency: MedlinePlus Genetics (National Library of Medicine)
- ClinicalTrials.gov: Fatigue (National Institutes of Health)
Journal Articles References and abstracts from MEDLINE/PubMed (National Library of Medicine)
- Article: Reliability and Repeatability Analysis of Indices to Measure Gait Deterioration in...
- Article: A correlation study of emergency department nurses' fatigue, perceived stress, social...
- Article: The impact of exercise intervention for patients undergoing hemodialysis on fatigue...
- Fatigue -- see more articles