You normally lose about 10 cups (2.4 liters) of water every day — much more during exercise or illness. Learn how to stay hydrated.
Lifestyle and home remedies
Fatigue can signal many things. Here are some tips to help you decipher why you're wiped out and to regain your energy.
Foot pain? Headache? Sore throat? Skin rash? Use the Symptom Checker to find out what's causing your symptom.
Tests and diagnosis
May 02, 2014
- Hypotension. National Heart, Lung, and Blood Institute. http://www.nhlbi.nih.gov/health/health-topics/topics/hyp/. Accessed Jan. 6, 2014.
- Low blood pressure. American Heart Association. http://www.heart.org/HEARTORG/Conditions/HighBloodPressure/AboutHighBloodPressure/Low-Blood-Pressure_UCM_301785_Article.jsp. Accessed Jan. 6, 2014.
- Kaufman H, et al. Mechanisms, causes and evaluation of orthostatic hypotension. http://www.uptodate.com/home. Accessed Jan. 6, 2014.
- Kaufman H, et al. Treatment of orthostatic and postprandial hypotension. http://www.uptodate.com/home. Accessed Jan. 6, 2014.
- Bonow RO, et al. Braunwald's Heart Disease: A Textbook of Cardiovascular Medicine. 9th ed. Philadelphia, Pa.: Saunders Elsevier; 2012. http://www.clinicalkey.com. Accessed Jan. 6, 2014.
- NINDS Multiple system atrophy with orthostatic hypotension information page. National Institute for Neurological Disorders and Stroke. http://www.ninds.nih.gov/disorders/msa_orthostatic_hypotension/msa_orthostatic_hypotension.htm. Accessed Jan. 7, 2014.
- Shep SG (expert opinion). Mayo Clinic, Rochester, Minn. Jan. 11, 2014.