Heat Rash (cont.)
Benjamin Wedro, MD, FACEP, FAAEM
Dr. Ben Wedro practices emergency medicine at Gundersen Clinic, a regional trauma center in La Crosse, Wisconsin. His background includes undergraduate and medical studies at the University of Alberta, a Family Practice internship at Queen's University in Kingston, Ontario and residency training in Emergency Medicine at the University of Oklahoma Health Sciences Center.
Charles Patrick Davis, MD, PhD
Dr. Charles "Pat" Davis, MD, PhD, is a board certified Emergency Medicine doctor who currently practices as a consultant and staff member for hospitals. He has a PhD in Microbiology (UT at Austin), and the MD (Univ. Texas Medical Branch, Galveston). He is a Clinical Professor (retired) in the Division of Emergency Medicine, UT Health Science Center at San Antonio, and has been the Chief of Emergency Medicine at UT Medical Branch and at UTHSCSA with over 250 publications.
In this Article
- Heat rash facts
- What is heat rash?
- What are the causes of heat rash?
- What are the symptoms of heat rash in children and adults?
- What does heat rash look like?
- Heat rash pictures
- Who is at risk for heat rash?
- How is heat rash diagnosed?
- What is the treatment for heat rash?
- Home remedies for heat rash
- Medical treatment for heat rash
- How can heat rash be prevented?
- How effective are electric fans in preventing heat rash?
- How can people protect their health when temperatures are extremely high?
- How much water should I drink in hot weather?
- Should I take salt tablets during hot weather?
- What is the best clothing to wear in hot weather or a heat wave?
- What is the prognosis for heat rash?
- Pictures of Heat Rash - Slideshow
- Pictures of Summer Skin Hazards - Slideshow
- Pictures of Dehydration Tips - Slideshow
- Find a local Doctor in your town
How much water should I drink in hot weather?
It is hard to gauge how much water is lost through sweat, and the thirst mechanism may not be sensitive enough to remind a person to drink enough. In general, the kidneys are a good guide to whether there is enough water in the body. If the body is dehydrated, the kidneys will try to hold on to as much water as possible. Decreased urine production, urine concentrated in color, and a strong urine odor are signs that the kidneys are trying to conserve the body's water supply. Urine is clear when there is enough fluid in the body.
In a hot environment, a person should drink enough water to make the urine clear, and make sure the body is producing sweat. Sweat and urine loss also involves electrolyte loss. Although drinking water is good, other fluids such as sports drinks should also be consumed to replace lost electrolytes to avoid other problems like hypokalemia (low potassium). People that are taking medications for conditions such as diabetes, kidney problems, and congestive heart failure (CHF) need to be especially careful about their fluid intake, and discuss how to avoid hot-weather related problems with their doctor(s).
Should I take salt tablets during hot weather?
Taking salt tablets is rarely a good idea. While the body loses many electrolytes when it sweats, there are mechanisms in place to compensate for the loss. Usually, keeping the body hydrated with plain water is adequate but does not resupply electrolytes. Sports drinks (for example, Powerade, Gatorade) may be reasonable alternatives if prolonged exercise or work is required in hot conditions.
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