In this article, we will focus on providing you information about the causes, symptoms, treatments, preventions and some of your frequently asked questions about smelly rash under breasts.

So let's get started:

Causes Of Smelly Rash Under Breasts

Smelly rash under or beneath breasts can be attributed to many factors such as autoimmune disorders, Psoriasis, atopic dermatitis, cancers, infections, hives, obesity, diabetes, intertrigo, and the general lifestyle of a person.

The causes are discussed here:

Infectious Diseases

Part between breasts is moist, warm, and also is an area with low ventilation or oxygen, especially women that have large breasts.

And so, this together with low personal hygiene give a nice breeding home for bacteria and fungal growth.

These microbes colonize the area between your breasts causing severe skin conditions like rashes.

The bacteria and fungi in the absence of enough oxygen under the breasts respire anaerobically, producing an excretory byproduct called pyruvic acid.

This excretory product combines with sweat to produce an unpleasant odor.


Diabetes is a disease condition whereby the body insulin cannot convert excess glucose in the body due to abnormalities or defects in the hormone, which leads to too much free glucose in the body.

This also leads to excess sugar in the bloodstream, and a disease condition, which is known as Ketoacidosis ( this is a disease condition where the amount of ketones in the bloodstream rise above the normal level).

The excess sugar in the body will not only increase the level of ketones in the body, but also increases the level of fat accumulation in the body, especially around the breasts region.

This fat accumulation also increases skin-on-skin friction under the breasts, leading to skin inflammation, lesions, redness, and bumps.

The ketoacidosis produces an unpleasant smell, and so, this with the combination of sweat that is produced due to the skin-on-skin friction between the breasts, a bad smelly odor and rash will be produced.

Mode of lifestyle

Lifestyle also plays a major role in causing different types of skin rashes, between the breasts.

Low personal hygiene can help gather dirt under the breasts and this dirt may clog skin pores, which block the passage of air in and out of the breasts.

This causes skin redness, bumps, inflammation and hence rashes.

Combination of these conditions couple with sweat can also help cause Smelly rash under the breasts.


The abnormal growth of tissues in the body due to malignant cell growth is called cancer.

Women suffering with breasts cancer were found to suffer a smelly rash.

Contact Dermatitis

Contact dermatitis is a hypersensitive reactions that happen when a person's skin comes in contact with allergens such as fragrances, latex, and soaps.

And for the case of women with smelly rash between breasts, this happens when you wear a synthetic fabrics bra or fragrance-moisturizers.

The skin around your breasts is allergic to these types of chemicals.

The symptoms associated with contact dermatitis under breasts are usually blusters, bumps, smelly rash, itching, and burning.


These red itchy welts medically known as urticaria may appear and go within a few hours and typically last less than 24 hours. 

They maybe chronic, hanging around and regularly reoccurring.

 Contact dermatitis

As the name implies, this red, itchy, irritating rash is caused by contact with something in the environment.

Symptoms include blisters, bumps, itching and burning.

There are two types: allergic and irritant.

With allergic contact dermatitis, doctors will investigate patients' exposure history and do testing.

While irritant contact dermatitis can require a change in routine – for example, in the case of a bartender who may need protection from repeated exposure to water or detergent during the workday.

Other factors that can cause smelly rash beneath breasts are intertrigo, inverse psoriasis, poor eating habitat, and hormonal imbalance.

              Allergy to coconut oil

Common Symptoms Of Smelly Rash

The common symptoms associated with smelly rash are lesion under breasts, bumps, blisters, redness, itching, burning, inflammation and unpleasant odor.

Preventions Of Smelly Rash Under Breasts

> Good personal hygiene should be employed

> Good eating habitats should be developed

> Wearing wool and synthetic dresses should be avoided

> Use of harsh cosmetics such as fragrances-moisturizer should be avoided

Treatments Of Smelly Rash Under Breasts

> Patients should use barrier creams and absorptive powder to minimize moisture and friction between the breasts

> Patients should develop good habit of wearing very light, breathable and absorbent dresses to allow proper in and out of fresh air around the breasts

> Patients should engage in healthy physical exercises

> Patients should shower regularly with clean and medicated water and soap, and afterward, dry the under breasts with absorbent powder thoroughly

> Patients with bacterial and fungal infection should be treated with antiseptic, antibiotics or antifungal

> Use of antibiotics for the treatment of smelly rash should be done wisely so as to prevent fungal growth

> Patients should avoid wearing synthetic fabrics and wool, and also they should be encouraged to wear breathable, light and absorbent cloth such as cotton

Learn more about the home remedies for skin rashes

Frequently Asked Questions About Smelly Rash Under Breasts

What causes smell under breast?

Smell under breast may be due to over secretion of sebum by sebaceous gland and skin conditions like intertrigo.

This traps moisture under the breasts, thereby providing an environment for bacterial and fungal growth.

These microbes respire anaerobically, producing a gaseous substance with a fishy smell.

How do you get rid of yeast infection under your breast?

Use of antimicrobial creams and drugs such as erythromycin, clotrimazole and hydrocortisone creams.

It is also important to consider taking a shower with medicated soap, this will help prevent you from the effect of fungal growth on your body.

How do you treat intertrigo?

Consult your doctor for proper medical check-up.

Over-the-counter treatments available are short term use of a topical steroid and other antifungal and antibiotic creams.

This helps to lower the inflammation and redness caused by the intertrigo.

What does a sweat rash look like?

The symptoms of sweat rash are red bumps on the skin, and a prickly or itchy feeling.

Due to inflammation, the rash appears as reddish with tiny blisters.

How do I stop sweat rash under my breasts?

Normally, women sometimes use bra liners or mini pads. This helps to absorb moisture under the breasts.

It is also recommended to wear loose-fitting dresses of cotton, this will allow proper in and out of air from your body.

Over-the-counter treatments can also help reduce sweat rash under your breast such as organic powder.

Clean the affected area with antimicrobial powder and creams.

While using moisturizers, creams, soap and perfumes, distance yourself from using any cosmetics that can attract moisture.

What can I put on a rash under my breast?

Treat the affected area with antimicrobial soaps. Then, topically apply non-moisturizing medicated creams on the affected area. Find a loose dress made with pure cotton. This allows proper ventilation and prevents microbial growth.

Try not to touch the affected area and avoid using synthetic soaps, perfumes, creams, and lotions.

Why do I keep getting a rash under my breast?

The reason why you keep seeing a rash under your breast is because the causative agents responsible for the skin rashes such as bacteria and fungi are not well treated or the conditions favoring the growth of fungi and bacteria under the breasts are not well managed.

Symptoms of intertrigo is appeared to be like a mirror image on both sides of the breasts.

Intertrigo can also be recognized with irritation, skin lesions, redness, and inflammation around the affected area.

How do I get rid of intertrigo fast?

Treating uncomplicated intertrigo can be done by applying cotton compresses that is saturated with drying solution such as Burow's solution on the skinfolds for about 20-30 minutes at different times a day.

Other medications include hydrocortisone creams and antiseptic drugs.

What causes a yeast infection under your Breast?

The causative agent of yeast infection under the breast is Fungus candida.

This type of microbe survive well in a dam moist and warm areas such as under skinfolds and arms.

Over-the-counter treatments are steroids, antimicrobial drugs and creams.


 We hope that this post was of excellent help for you in understanding the causes, symptoms, preventions, and treatments of smelly rash under breasts.

We would love listening to your views about the causes, symptoms, preventions, and treatments of smelly rashes under breasts.

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