Low blood pressure (hypotension) can be a sign of good health or of a life-threatening condition. Find out more about hypotension's causes and treatment options.
Foot pain? Headache? Sore throat? Skin rash? Use the Symptom Checker to find out what's causing your symptom.
Tachycardia, a rapid heart rate, is caused by an abnormality in your heart's electrical impulses. Tachycardia can cause serious complications, including sudden cardiac arrest.
Tests and diagnosis
Treatments and drugs
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.