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February 10, 2012

Patient Discussions: Heat Rash - Describe Your Experience

Question:Please describe your experience with heat rash.

Comment from: Niki, 35-44 Female Published: April 21

I recently took a trip to Malaysia. It was hot and humid. Even though I was in air conditioning for most of the trip, I developed a skin rash around the outside of my arm pits and on the front side of both of my thighs. I thought it was something quite serious as I had never experienced this before, but my doctor told me it was a skin heat rash. It's been three days since I detected it, and it feels itchy and hot to the touch.

Related Reading: rash | heat rash

Comment from: 25-34 Female (Patient) Published: March 31

I get heat rash under my watch whether I'm wearing it or not. I also get it around my bra line, on my sides, stomach, and under my waste. It's also common for me to see it on my hands. I break out in hives, and in severe cases, the hives look like welts or blisters. I just take Benadryl for it, and it usually takes the itching away. Once I do that, I try to get out of the heat, and it goes the rest of the way on its own. Although, I got the most severe case I've ever had while at the gym this morning. The prickly sensations almost had me in tears.

Related Reading: hives | itching

Comment from: distancebiker, 35-44 Male Published: July 01

I am an avid bicyclist and I just recently got a bike jersey and bike shorts (they fit very snug next to my skin on the upper part of my legs). I wore them for the first time when I went on a long bike ride and then when I came back I noticed a red spot on each upper part of my leg. I went to the bike store where I get my bike tuned up and I showed the guy working there the red spots and he said that, that usually does not happen when wearing those types of shorts, but he gave me some chamois butter to use before my rides. I am wondering if the material in these shorts have an effect on my skin that causes these red spots or if it's just because of riding in the mild weather (it felt like 75 to 80 degrees ). The material in the shorts are: 60% Nylon, 24% Polyester and 16% Elasthane. I also carry some water with me when I ride on my long rides (35 to 54 miles). Do these shorts trap heat inside causing this rash? Or do I need to just go biking in the very cool weather (early evenings )? I put cream on the rash to help it go away.

Comment from: beribnlist, 55-64 Female Published: June 29

I am a Chef, developed a severe heat rash, under my breast, by the bra line, lower stomach and the groin area. The heat rash was so bad, my skin looked like I was burned, and taking a shower was very painful. I have never had anything like this before. I also had a rash on my one leg which I would scratch in my sleep until it would bleed. I went to the health food store and bought a liver detox tea and stopped eating any processed food and started using tar soap on the two areas. The rash on my leg went away and also relieved the heat rash. Now if eat any processed food the heat rash will start again. I think part of the problem is what is put in any processed food, or frozen meals. When ever I eat any frozen meal I know I will get the rash back and I have to drink detox tea.

Related Reading: breast | sleep | liver

Comment from: jJPx, 25-34 Male (Patient) Published: June 24

I was on a two-week trip in Vietnam in the summertime. I developed heat rash around my groin and torso. The humidity there made it near impossible to keep my skin dry. When I got home, I applied powders to help absorb excess moisture. This got it under control and I believe led to its eventual cessation. It was quite uncomfortable and disturbing since I've never experienced a rash like that; especially being far from home.

Comment from: spechtsk, 45-54 Female (Patient) Published: May 20

My heat rash is all over my belly, breast, under my arms, neck, upper chest, and all over my back. The rash is almost like blisters that ooze. It is very uncomfortable going out in the heat, and I live in Arizona. I am assuming the heat rash is because of medications I am taking that all have heat sensitive warnings on them. I have found no comfort for it, yet.

Comment from: iy51201, Female Published: May 04

I have been experiencing rashes that periodically develop under folds of my skin, and they tend to inflame the skin, cause itchy irritation, and the skin tends to crack and pull apart easily, causing wounds. These rashes tend to appear periodically in the areas on my legs near the buttocks, under the breasts and under the fold of skin on my abdomen. I've noticed a smell and a sticky surface under the abdomen fold and the breasts, and it seemed they tended to appear during warmer weather. I began keeping the areas clean and dry by using Gold Bond Medicated Powder, but now, it seems the powder is not helping in any way.


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Heat Rash - Treatment Question: What was your heat rash treatment?
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Suggested Reading on Heat Rash by Our Doctors

  • Related Diseases & Conditions

    • Eczema
      • Eczema, also known as dermatitis, is a general term for many types of skin inflammation. The most common form of eczema is atopic dermatitis. The other forms of eczema include: contact eczema, seborrheic eczema, Nummular eczema, Neurodermatitis, stasis dermatitis, and dyshidrotic eczema. Symptoms, diagnosis, and treatment of eczema may vary from person to person and may depend on the type of eczema.
    • Dehydration
      • Dehydration is the excessive loss of body water. There are a number of causes of dehydration including heat exposure, prolonged vigorous exercise, and some diseases of the gastrointestinal tract. The best way to treat dehydration is to prevent it from occurring.
    • Fever
      • Although a fever technically is any body temperature above the normal of 98.6 degrees F. (37 degrees C.), in practice a person is usually not considered to have a significant fever until the temperature is above 100.4 degrees F (38 degrees C.). Fever is part of the body's own disease-fighting arsenal: rising body temperatures apparently are capable of killing off many disease- producing organisms.
    • Heat Stroke
      • Heat stroke (heatstroke or sun stroke) is a form of hyperthermia. Heat stroke is a true medical emergency that can be fatal if not promptly and properly treated. Symptoms of heat stroke include: high body temperature, absence of sweating, with hot red or flushed dry skin, rapid pulse, difficulty breathing, strange behavior, hallucinations, confusion, agitation, disorientation, seizure, and coma. A victim of heat stroke must receive immediate treatment to avoid permanent organ damage.
    • Heart Disease
      • Heart disease (coronary artery disease) is caused by a buildup of cholesterol deposits in the coronary arteries. Risk factors for heart disease include smoking, high blood pressure, heredity, diabetes, peripheral artery disease, and obesity. Symptoms include chest pain and shortness of breath. There are a variety of tests used to diagnose coronary artery disease. Treatment includes life-style changes, medications, procedures, or surgery.
    • Obesity
      • Obesity is the state of being well above one's normal weight. A person has traditionally been considered to be obese if they are more than 20 percent over their ideal weight. That ideal weight must take into account the person's height, age, sex, and build.
    • Heat Exhaustion
      • Heat exhaustion is a milder form of heat-related illness that can develop after several days of exposure to high temperatures and inadequate or unbalanced replacement fluids. Warning signs of heat exhaustion include heavy sweating, paleness, muscle cramps, tiredness, weakness, dizziness, headache, nausea or vomiting, and fainting.
    • Sun-Sensitive Drugs (Photosensitivity to Drugs)
      • Sun sensitivity (photosensitivity) is an inflammation of the skin induced by the combination of medications or substances and sunlight. The affect on the skin is redness, which looks similar to a sunburn. Generally, these reactions are either phototoxic or photoallergic. Phototoxic drugs are more common than photoallergic drugs. Symptoms of phototoxic reactions are a burning and stinging sensation and then redness. Symptoms of photoallergic reactions are itching, redness, swelling, blisters of the affected area. Treatment generally is discontinuation of the medication and topical application of creams.
    • Sunburn (Sun Poisoning)
      • Sunburn is caused by overexposure to UV radiation from the sun. UV rays can also damage the eyes. Repeated overexposure to UV rays also increases the risk for scarring, freckles, wrinkles, and dry skin. Symptoms of sunburn include painful, red, tender, and hot skin. The skin may blister, swell, and peel. Sun poisoning (severe sunburn) include nausea, fever, chills, rapid pulse, dizziness and more. Treatment for sunburn depends upon the severity. Sun protection and sunscreen for an individual's skin type is recommended to decrease the chance of sunburn.
    • Heat-Related Illness
      • Hyperthermia is the overheating of the body. Heat-related illnesses like heat stroke, heat exhaustion, heat cramps, heat rash, and sunburn are all hyperthermia conditions. Treatment of these conditions depends upon the condition, environment, and circumstances. Heat stroke is a medical emergency, and may result in death if not treated promptly. Heat exhaustion may lead to heat stroke if not treated properly.
    • Sunscreen
      • Sunscreens are crucial for sun protection. Sun damage to the skin from exposure to ultraviolet rays is a risk factor for skin cancer and melanoma. To avoid sunburn, people should limit sun exposure during the peak hours of 10 a.m. to 3 p.m., wear protective clothing, and use a sunscreen. People with sensitive skin should use a sunscreen with an SPF of 30 or more.
    • Children's Health
      • Children's health is focused on the well-being of children from conception through adolescence. There are many aspects of children's health, including growth and development, illnesses, injuries, behavior, mental illness, family health and community health.
    • Heat Cramps
      • Heat cramps usually affect people who sweat a lot during strenuous activity or work in a hot humid environment. Symptoms of heat cramps are muscle pains or spasms, usually in the abdomen, arms or legs that occur in association with strenuous activity. Heat cramps is part of a group of heat-related illnesses.
    • First Aid
      • First aid is a complicated subject and it is situation-specific. First aid is the help and medical assistance that someone gives, not only to an injured person, but to a person who is sick. Preparedness is a key element of first aid, like having basic medical emergency kits in your home, car, boat, or RV. Cuts, puncture wounds, sprains, strains, nosebleeds are one type of injury that may require first aid; heart attacks, strokes, seizures, and heat stroke are examples of more critical first aid emergencies.
    • Hurricane Preparedness
      • Natural diasters such as a hurricane can take a toll on family, friends, and neighbors. Both physiological and psychological stresses can be devastating. Learn how to prepare for a hurricane like food storage, safe water, first aid measures, cleaning mold, wearing protective gear, preparing for electrical hazards, avoiding carbon monoxide, avoiding physical injuries and hazardous materials, preventing drowning, reducing the risk of thermal stress, and preventing fatigue related injuries.
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Heat Rash

Heat-related illness facts

  • Hyperthermia is overheating of the body.
  • Heat-related illness occurs as a result of heat exposure.
  • Heat-related illnesses include heat stroke, heat exhaustion, heat cramps, heat syncope, and heat rash.
  • Heat stroke is the most severe form of heat-related illness, and requires immediate medical attention.
  • Certain individuals, such as the elderly, infants and young children, the obese, and those with chronic medical conditions are at increased risk for developing heat-related illness.
  • Signs and symptoms of heat-related illness vary based on the condition, but may include an elevated body temperature, headache, nausea, weakness, dizziness, fainting, muscle cramps, and coma.
  • Treatment for heat-related illness generally includes moving the individual out of the hot environment, ...

Read the Heat-Related Illness article »




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