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Taking care of irritations.

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sweat rash under armpit and breasts

Heat rash

What is a heat rash?

Heat rash is a very common condition and can occur at any time. Natural yeast on your skin called candida causes irritation when your skin’s natural balance is altered. This can happen when sweat from your glands doesn’t evaporate completely.

Your skin can become itchy and irritable, with a red rash, a burning sensation, or broken skin. Prickly heat, exercise, sweating heavily, changes in skin or body care products, synthetic fabrics and tight clothes can all aggravate sweat rash.

Some people have sensitive skin that reacts to the fragrances or perfume in some products. Or they may be allergic to other ingredients like alcohol and aluminium salts, which may cause heat rash.

What causes heat rash?

Heat rash tends to happen in places where skin can rub together, such as the armpits, the backs of the knees, between the legs, the groin, and between and under the breasts. It can also happen where clothes rub against places where sweat is released, such as a sleeveless vest rubbing on your underarms.

How to stop heat rash?

Most types of heat rash will clear up naturally. If you are sensitive to perfume or fragrance, or have a history of eczema, then it is a good idea to wear a fragrance-free deodorant. You could also try using an emollient or moisturiser alongside your antiperspirant or deodorant.

How to prevent heat rash

Making a few changes to your routine can also help. Read these tips to learn how to prevent heat rashes:

  • When exercising, wear loose-fitting clothes and choose fabrics that draw sweat away from your skin, like cotton and linen.
  • In hot weather, if your skin gets irritable, stay hydrated and take cooler showers and baths.
  • If a new skincare product starts to irritate your skin, stop using it.
  • If a heat rash develops, wear lightweight clothing made from natural fabrics like cotton and avoid synthetic fibres.
  • Antiperspirants containing aluminium salts can help control your sweat, which can help prevent heat rash, but they can also irritate the skin. If this happens, you may want to use an emollient cream or moisturiser with your antiperspirant.

If you’re worried about a rash, always speak to your doctor or healthcare professional.

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