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
- Brain Tumors and Fatigue (National Brain Tumor Society)
- Cancer Fatigue: Why It Occurs and How to Cope (Mayo Foundation for Medical Education and Research)
- Fatigue (PDQ) (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
- Fatigue with HIV/AIDS (New Mexico AIDS Education and Training Center) Also in Spanish
- Is Fatigue a Common Crohn's Disease Symptom? What Can Be Done about It? (Mayo Foundation for Medical Education and Research)
- Genetics Home Reference: corticosteroid-binding globulin deficiency (National Library of Medicine)
Health Check Tools
- Weakness or Fatigue (DSHI Systems)
- ClinicalTrials.gov: Fatigue (National Institutes of Health)
Journal Articles References and abstracts from MEDLINE/PubMed (National Library of Medicine)
- Article: Distinguishing Depressive Symptoms From Similar Cancer-Related Somatic Symptoms: Implications for...
- Article: Light therapy for multiple sclerosis-associated fatigue: Study protocol for a...
- Article: Addressing Occupational Fatigue in Nurses: Current State of Fatigue Risk...
- Fatigue -- see more articles