Skin tags under the breasts are benign skin growths caused by friction between the skin fold and the bra line. They are not dangerous, not contagious, and do not indicate anything medically wrong. If they are bothering you, they can be removed at home or in a clinic. The one rule before treating: confirm it is actually a skin tag, because this location can also host other conditions that look similar.
For a complete picture of what skin tags are, including all body locations, see our full skin-tag guide. This page covers the under-breast location specifically.
Key takeaways
What causes under-breast skin tags, and what to do about them.
- Friction between the skin fold and bra line is the primary cause. Moisture trapped in the fold accelerates tag formation.
- Under-breast skin tags are benign. They do not go away on their own, but they are safe to remove once confirmed.
- Before treating, rule out intertrigo, candida rash, or other fold conditions that require different care.
- At-home removal with the OcuraLife Plasma Pen works here. The location needs extra prep: dry skin, a clear sightline, and a healing patch over the bra line after treatment.
- Do not use a plasma pen if you are pregnant or nursing. See a dermatologist instead.
Why skin tags form under the breasts
Skin tags form where skin rubs against skin or fabric repeatedly. The under-breast fold checks every box for that friction equation. The sub-breast crease sits in constant contact with the bra band or underwire. Sweat accumulates in the fold during warm weather and physical activity. The fold itself deepens with breast size and weight, creating more skin-on-skin surface area for friction to act on.
Hormonal changes compound the mechanical driver. Pregnancy, perimenopause, and significant weight fluctuation all soften the connective tissue and deepen the fold. This is why under-breast skin tags are more common during and after pregnancy, and why they tend to cluster in this location rather than appearing singly. According to Mayo Clinic, skin tags are most common in areas of skin friction and are strongly associated with hormonal changes and weight gain.
The result is that the under-breast fold is one of the top five skin-tag locations on the body, alongside the neck, armpits, groin, and eyelids. This is not a sign of anything wrong. It is a mechanical outcome of how that fold functions day to day.
Are under-breast skin tags dangerous? When to see a doctor
Safety check before any at-home treatment
Skin tags are benign. But the under-breast fold can host other conditions that look similar and need different care. Before treating anything in this location, confirm what you are looking at.
See a doctor before at-home removal if any growth in this location:
- Is surrounded by red, itchy, or inflamed skin (this may be intertrigo or a candida rash, not a skin tag).
- Bleeds without contact, grows rapidly, or has irregular borders.
- Is flat rather than pedunculated (skin tags hang on a narrow stalk; flat pigmented spots are a different finding).
- Has changed in appearance in recent weeks.
- You are pregnant or nursing.
A confirmed skin tag is a soft, flesh-colored growth hanging on a narrow stalk, stable in size, with no surrounding inflammation. That is the pattern that is safe to treat at home. Per the American Academy of Dermatology, any skin lesion that changes, bleeds, or looks atypical should be evaluated in person before any at-home removal is considered.
How to treat skin tags under the breasts at home
The OcuraLife Plasma Pen delivers a focused plasma arc to the stalk of the skin tag, drying it from the surface. A small scab forms, falls off on its own between Day 3 and Day 7, and the skin renews by Week 2 to 3. The under-breast location requires a bit more preparation than a facial tag because the fold is warm, it is not directly visible in a standard mirror, and bra friction can disturb the healing scab.
Preparing for treatment in this location
The under-breast fold is not easily visible without a hand mirror or phone camera. Set one up before you begin, so you can see exactly what you are treating. Apply numbing cream to the tag and the immediate area 20-30 minutes before treatment. Keep the fold dry: if you are prone to sweating in this area, apply a thin strip of tissue or paper towel under the breast to absorb moisture before starting. Go bra-free on the day of treatment if possible, at least for the hours around the session.
Applying the pen safely
Use a low-to-mid power setting (2-4 out of 9 levels) for the fold skin, which is softer and more sensitive than facial skin. Touch the tip to the stalk of the tag, not to the surrounding flat skin. A single brief 5-minute pass is enough for a small tag. If the tag is large or sits very deep in the fold, a shorter first pass and a second session after full healing is the safer approach.
If you are plus-size or have larger breasts
Skin-on-skin friction is greater in deeper folds, which is why under-breast skin tags tend to appear in clusters rather than singly for women with larger breasts. The same plasma pen method applies. On the day of treatment, fold a thin piece of paper towel under the breast to keep the fold skin taut and accessible, and to absorb any moisture. Treat one tag per session, then let the scab heal fully before treating the next one in the cluster.
The healing timeline for this specific location
The under-breast fold is warmer and more occluded than facial skin. Keeping the treated area dry during the scab phase is the single most important factor for clean healing in this location.
Keeping the fold dry during the scab phase is the difference between a clean result and a slower one. A healing patch and one bra-free day at home covers most of that.
Personalized situations
If you are pregnant or nursing
Skin tags often appear or multiply during pregnancy because of hormonal changes and the deepening of body folds under increased weight. Do not use an at-home plasma pen during pregnancy or while nursing. The cautious recommendation is to wait until after delivery and the end of the nursing period, then treat. In the meantime, see a dermatologist if a tag becomes irritated or bleeds from bra friction.
If the tag is large or deep in the fold
Tags larger than roughly a pencil eraser, or those that sit in a very deep or difficult-to-access part of the fold, are better handled by a dermatologist. The deeper and more occluded the location, the harder it is to apply the pen safely and to keep the area dry during healing. A clinical visit for one larger tag, then at-home management for smaller recurrences, is a reasonable split.
For a related location with similar considerations, see our guide on skin tags in the groin and inner thighs.
The bottom line
Skin tags under the breasts are extremely common, benign, and caused by friction in the sub-breast fold. They do not go away on their own, but they can be removed at home once you have confirmed the growth is a skin tag. The under-breast location needs a bit more preparation than a facial tag: dry skin, a clear sightline with a mirror, and a healing patch between the bra line and the treated spot during healing. If you are pregnant, see a dermatologist instead of treating at home. For any growth you are not sure about, especially one with surrounding inflammation or irregular borders, get a professional look first.
For more on skin-tag locations with similar considerations, see our guide on skin tags in the groin and inner thighs or the identification comparison at soft fibroma vs skin tag.
Built for skin tags wherever they form
The OcuraLife Plasma Pen is built for this
Delivers focused plasma energy directly to the stalk of the skin tag. 9 adjustable power settings, single-use sterile tips. A scab forms, falls off on its own, and the skin renews in two to three weeks.
See the Plasma Pen