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June 12, 2025, 1:08 pm | Read time: 6 minutes

Why Do We Sweat?

“Sweating is a vital and completely natural process to regulate body temperature. As soon as the outside temperature rises or the body heats up, nerve cells send an alarm signal to the brain to activate the sweat glands,” explains Dr. med. Dr. med. in Düsseldorf, a dermatologist and allergist. “These immediately begin to produce droplets, which emerge as sweat through the pores to the skin’s surface and evaporate. This evaporation then brings about the cooling effect.” This is how breast sweat also occurs.

Why Do We Sweat Under and Between the Breasts?

“First, it must be said that breast sweat, also called boob sweat, is a completely normal physical reaction,” says Dr. Sadlo. “Due to the natural anatomy of the breast, there is a skin fold between the breast and the torso. Since air cannot circulate adequately here, heat and excessive moisture build up. This can also be difficult to dry due to the skin fold, which promotes unpleasant odor formation and skin irritation. This irritation is caused by moisture and friction, with the areas between and under the breasts being the most common spots for chafed, sore skin.” Women with larger breasts tend to sweat more under the breast than others and are more likely to suffer from irritated skin, as the larger the surface area under the breasts, the more heat builds up.

Also interesting: 9 Tips Against Sweat in the Intimate Area

Does Sweat Odor Also Develop Under the Breasts?

“Sweat odor is not caused by sweat alone, but by the germs that break down the sweat,” says Dr. Sadlo. “You can prevent odor formation by cleaning the skin with gentle, antibacterial solutions. Over-the-counter products such as Tricolosan or Octenisept are suitable for this, and they also help prevent yeast infections.”

Why Do I Sweat Particularly at Night on My Chest?

“The torso, including the chest and neck, is a particularly heat-sensitive area of the body. It responds with sweating to high temperatures as well as to nervousness or fever. Accordingly, the so-called night sweats can also appear mainly on the chest and neck,” explains Dr. Sadlo.

Why Should You Prevent Breast Sweat?

“Sweating leads to moisture loss and thus attacks the skin barrier, making it more susceptible to diseases. Increased sweating, especially under the breasts, can lead to intertrigo, a common form of dermatitis. This irritation affects intertriginous body areas, meaning areas where opposing skin surfaces touch, such as the groin and genital area, the armpits, and under the breasts,” explains Dr. Sadlo. “Intertrigo, also known as intertriginous eczema or chafing, often leads to fungal and bacterial infections. If you suspect this, you should see your dermatologist. They can prescribe a disinfectant ointment for acute treatment or corticosteroid ointments, depending on the severity. In the case of a fungal infection, appropriate antifungal creams are also used.”

What to Do About Pimples After Breast Sweat?

Sudden pimple formation should be examined by a dermatologist. It can indicate either a self-healing inflammation of the hair follicles or a fungal infection that requires treatment.

What to Do About Acute Sore Spots?

“First, the affected area should be cleaned with pH-neutral, mild soap or clear water to remove bacteria. Then apply a re-fatting, moisturizing ointment, such as one with lanolin, or use argan oil. This has been used for centuries to treat skin infections and can alleviate breast sweat and skin irritations,” says Dr. Sadlo. “A cold compress can also help reduce swelling and pain.” Generally, avoid harsh, perfumed shower gels to prevent unnecessary irritation to the skin.

Also interesting: 9 Tips Against Sweat in the Intimate Area

How Can You Prevent Breast Sweat?

1. Cotton Instead of Synthetics

Most bras are made from synthetic materials like polyester and viscose. These are not breathable and trap heat and moisture. As a result, sweat cannot evaporate, leading to unpleasant odor and skin irritation. Instead, opt for cotton, as it is a naturally breathable fabric that prevents heat buildup. However, it takes a long time to dry. A breathable lace bra, even if made of synthetics, traps less moisture and offers a more breathable alternative.

2. Unpadded Bras

“Any padding, such as in push-up bras, is an additional layer of clothing that causes even more heat buildup,” says Dr. Sadlo. “Instead, opt for unpadded bras made of breathable materials to reduce the risk of skin infections.”

3. Cotton Inserts for Bras

There are special bra inserts made of cotton that can wick moisture away from the skin and help prevent irritation. Alternatively, you can also try nursing pads.

4. Sports Bras

Sports bras, made from breathable, sweat-wicking materials, can be worn daily to prevent uncomfortable sweat buildup.

5. Go Without a Bra More Often

Consider going without a bra more often, as sweat will evaporate immediately. If you’re concerned about your nipples showing, you can use pasties.

6. Loose Tops

Refresh yourself with wet wipes in between.

7. Breast Deodorant or Aluminum-Free Deodorant

Use a deodorant specifically designed for the breast area or an aluminum-free deodorant to mask sweat odor (deodorization) and apply it under the breasts. Avoid antiperspirants, as some scientists have linked the aluminum they contain to health concerns.

8. DIY Deodorant

You can also make your own deodorant using cornstarch and baking soda.

9. Cream Against Chafing

Use a special cream stick to prevent chafing. The stick can also be used for chafing bra straps.

10. Baby Powder

You can apply baby powder to stop chafing. You can also buy talc-free powders specifically designed to stop sweat.

11. Panty Liners

Use panty liners to absorb sweat and prevent stains on your clothing, whether you’re at a business meeting in the height of summer or just enjoying a rooftop party.

12. Keep Wet Wipes Handy

Refresh yourself with wet wipes in between.

13. Hygiene

Prevent odor by washing your bras regularly.

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In Case of Excessive Sweating

“If your sweating seems excessively strong and begins to affect your daily life, you should schedule an appointment with your dermatologist. You may be showing signs of hyperhidrosis, a condition characterized by excessive, uncontrollable, and therefore pathological sweating, which affects around one million people in Germany alone,” advises Dr. Sadlo.

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