SymptomsBy Mayo Clinic Staff
Signs and symptoms of heat exhaustion may develop suddenly or over time, especially with prolonged periods of exercise. Possible heat exhaustion signs and symptoms include:
- Cool, moist skin with goose bumps when in the heat
- Heavy sweating
- Weak, rapid pulse
- Low blood pressure upon standing
- Muscle cramps
When to see a doctor
If you think you're experiencing heat exhaustion:
- Stop all activity and rest
- Move to a cooler place
- Drink cool water or sports drinks
Contact your doctor if your signs or symptoms worsen or if they don't improve within one hour. Seek immediate medical attention if your body temperature reaches 104 F (40 C) or higher.
Nov. 25, 2014
- Heat injury and heat exhaustion. American Academy of Orthopaedic Surgeons. http://orthoinfo.aaos.org/topic.cfm?topic=A00319. Accessed Oct. 1, 2014.
- Extreme heat: A prevention guide to promote your personal health and safety. Centers for Disease Control and Prevention. http://www.bt.cdc.gov/disasters/extremeheat/heat_guide.asp. Accessed Oct. 1, 2014.
- Marx JA, et al. Rosen's Emergency Medicine: Concepts and Clinical Practice. 8th ed. Philadelphia, Pa.: Mosby Elsevier; 2014. http://www.clinicalkey.com. Accessed Oct. 1, 2014.
- Mechem CC. Severe nonexertional hyperthermia (classic heat stroke) in adults. http://www.uptodate.com/home. Accessed Oct. 8, 2014.
- Using the heat index: A guide for employers. U.S. Department of Labor, Occupational Safety and Health Administration. http://www.osha.gov/SLTC/heatillness/heat_index/index.html. Accessed Oct. 2, 2014.
- Dehydration and heat stroke. Johns Hopkins School of Medicine. http://www.hopkinsmedicine.org/healthlibrary/conditions/non-traumatic_emergencies/dehydration_and_heat_stroke_85,P00828/. Accessed Oct. 1, 2014.
- Frequently asked questions about extreme heat. Centers for Disease Control and Prevention. http://www.bt.cdc.gov/disasters/extremeheat/faq.asp. Accessed Oct. 1, 2014.