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Heat Rash - Pictures, Symptoms, Causes, Treatment, Home Remedies

Updated on December 3, 2013

Heat Rash Pictures

What is a Heat rash?

This is a very common skin condition in which areas of your skin sting or feel prickly because your skin is overheated. It is also referred to as "miliaria" or "prickly heat". You can tell you have heat rash when you see an area of red skin with tiny bumps. You will usually get heat rash on parts of your body that are clothed such as you abdomen, neck, back, groin, armpits, and upper chest. It most often occurs in conditions that are hot and humid. Heat rash can affect anyone. There are three classifications of heat rash which are:

  • Miliaria Rubra - this is the most common type.
  • Miliaria Profunda - this is a less common type and is a severe form of miliaria rubra.
  • Miliaria Crystallina - this is another common type but is a milder case.


The symptoms of heat rash depend on the type of heat rash you have. The symptoms include:

Miliaria Rubra

  • Bumps that appear red
  • In the area that is affected you may have feelings of being itchy or prickly.
  • In the affected area there is little to no sweating.

Miliaria Profunda

  • Lesions that are flesh-colored and firm that look like goose bumps
  • No perspiration that could lead to having heat exhaustion

Milaria Crystallina

  • Papules and blisters that are fluid-filled, clear, and easily break.
  • The blisters are not painful or itchy.


The main cause of heat rash is sweat getting trapped under the skin instead of evaporating. You can find your sweat glands in the middle layer of your outer layer of skin and if you are wearing too many clothes they can become clogged.

Some of the reasons that your sweat ducts can become clogged include:

  • You can also get heat rash if you have creases or folds between the areas of your skin where it can collect sweat.
  • If you use too much creams or lotions you can also clog not only your pores but also the sweat glands.
  • Your sweat ducts are immature such as in a newborn. Because their sweat ducts are not completely developed they may rupture easier trapping perspiration beneath their skin. Usually this will happen in just hot weather but it has been known to happen if the baby is dressed too warm. If they are in an incubator because they are premature or develop a high fever they could also develop sweat ducts that are blocked.
  • Tropical climates where the weather is hot and humid.
  • Doing physical activity such as working hard, intense exercise, or any thing that can cause you to perspire a lot.
  • Certain fabrics that will not let perspiration evaporate normally can cause heat rash.
  • Certain medications that enhance your sweat gland functions.
  • General overheating such as sleeping with the electric blanket or wearing too many clothes in the winter.
  • It can happen to people who are confined to bed for a long period of time. This is especially true if they have a fever.


The best treatment for heat rash is to make sure that you are getting plenty of air circulating around the skin. This means that you need to wear the type of clothing that will allow your skin to “breathe.” Your clothes should be loose and light. To help minimize your symptoms you need to drink lots of water and stay cool. By doing this you can help make sure that your symptoms do no go into heat stroke.

Usually it will go away on its on but if it does not you may have to used some topical creams such as:

  • A lubricating ointment called "Anhydrous lanolin".
  • A lotion to help reduce the itching called "Calamine lotion".
  • A lotion to help clear up the inflammation called "Steroid creams".

You should also eat fruits that have a high water content such as watermelon, get into an area with air conditioning or at least find some shade, and mover around so your body gets air circulating around it.

Home Remedies

There are a variety of home remedies that a person can use who has heat rash. Some of those include:

  • Using aloe Vera - you can use the aloe from the plant if you have one or you can purchase some aloe Vera lotion at the store. Using aloe Vera will help to reduce the itch and helps with the healing process. You should apply the aloe Vera at least two times a day.
  • After you have taken a shower or cool bath you can dust your body with baby powder that is unscented or you could use baking soda or cornstarch. Using any of these three can help to eliminate any extra moister on your body that could give you heat rash.
  • If the heat rash is giving you discomfort you can cool your skin down by putting ice cubes in a plastic bag that seals, then wrap it in a dishtowel and put it on the area that is affected from five minutes to ten minutes. You can repeat this treatment every four hours to six hours.
  • After taking a shower or bath let your skin air dry if you can instead of drying off with a towel.
  • If you can stand it take a cold shower or bath to help get rid of the prickly sensation that often comes with heat rash. If you are taking a bath add some oatmeal powder that is fine grained, or baking soda. If you do not like the idea of a cold bath or shower, you can use lukewarm water. Make sure that whatever you add to the water is stirred in. You should try to do this up to three times a day.
  • Add a teaspoon of baking soda to a cup of water, soak a washcloth in the mixture, and apply to the areas of your body that are affected for ten to fifteen minutes at a time several times a day. This home remedy will help to ease the itchiness.
  • If your baby is suffering from heat rash, let them just wear a diaper and make sure that they are in a cool room to help ease their heat rash.
  • Rub the area with the inside of the rind of a watermelon.
  • To help relieve the itch take a vitamin C supplement every day.
  • Use cucumber slices to rub over the heat rash will help to cool your skin.
  • You can also apply chamomile tea on the heat rash.


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      3 years ago

      If he didn't have the rash before the waether turned hot It is probably a heat rash.To keep him comfortable be sure to keep an eye on his neck area,young babies tend to have heat rash on the front of the neck ,because they can't hold their head up yet and in the heat they will sweat and not much air can get in that area to dry it up.Baby acne is very common. It can be present at birth, but more often it shows up after a couple of weeks, usually on the cheeks and sometimes on the forehead, chin, and even the back. These small whiteheads might be surrounded by reddish skin, and they can become more pronounced when your baby is hot or fussy, or if his skin is irritated by saliva, spit-up milk, or fabric that's been washed in strong detergent.By the way, if your baby had tiny bumps on his face at birth that disappeared within two weeks, these are called milia and are unrelated to acne. If his breakout looks more rashy or scaly than pimply, or if it appears elsewhere on his body, he may have another condition, such as cradle cap or eczema.Try washing all his clothes using baby Ivory Snow laundry detergent or Dreft Baby laundry detergent.avoid using any chlorine bleach.If you really need to bleach run the clothes through a second short wash with no detergent .When my kids were babies in the summer I'd only put the diaper on them then wet a washcloth in warm water and lay it over their body as the cloth cools his body can adjust gradually to the coolness.As he gets older in a month or so,he'll enjoy playing with the cool clothDon't put baby oil on your baby,it clogs the pores and if it is applied over the back and chest can create difficulty breathing. You can do a test on yourself to see the effects.I never knew this and always pot the baby oil on my baby's,then one summer it was pretty hot.I used baby oil to speed up my tanning and within a few minutes in the sun I couldn't breathe. Try to stay calm,I know that isn't easy with new borns! Your in laws give good advice,don't hesitate to call on Grandma and Grandpa, Best wishes to you and your New Baby CONGRATS


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