Spot Checker · Buttock
Sore that won't heal on the Buttock: Causes, Red Flags & When to Worry
Quick answer
A sore that won't heal on the buttock is frequently the result of pressure sores from prolonged sitting, painful boils, or infected hair follicles. More stubborn wounds can also be signs of diabetic or poor circulation ulcers. The biggest red flag is a sore that continues to grow, bleeds easily, or develops into a new, dark spot. Even in areas hidden from the sun, this could indicate common skin cancers, requiring a prompt medical check.
Why a sore that won't heal on the buttock is different
The buttocks are prone to folliculitis, boils, pressure-related changes and contact dermatitis from prolonged sitting, but new dark lesions still warrant a check.
Because the buttocks are typically covered, unhealing sores here behave differently than those on your face or arms. Skin cancers triggered by harsh sunlight are much less likely due to a lack of UV exposure. Instead, the physical anatomy of this area makes it uniquely vulnerable to heavy friction, trapped sweat, and irritation from tight clothes. Prolonged sitting applies intense pressure to the tissues, making pressure sores, contact dermatitis, and infected hair follicles from shaving the most common everyday culprits. While severe diabetic or venous ulcers usually strike the lower legs, poor circulation can clearly still delay healing on your backside. It is totally normal for spots here to take slightly longer to clear up due to constant rubbing, but you should always have any unusually dark or bleeding spot evaluated just to be safe.
The most common day-to-day triggers in this area are prolonged sitting, sweat and tight clothing, shaving and waxing — each of which can produce or worsen a sore that won't heal here.
Most likely causes
Basal cell carcinoma
Classic "non-healing sore" — often on the face or scalp.
Squamous cell carcinoma
Scaly, sometimes ulcerated lesion on sun-damaged skin.
Venous leg ulcer
Shallow ulcer above the inner ankle in older adults.
Diabetic foot ulcer
Painless ulcer on pressure points in diabetes.
Red flags — see a clinician
- •Any sore that hasn't healed in 4 weeks
- •Recurs in the exact same spot
- •Bleeds, oozes or has rolled raised edges
- •In someone with diabetes or poor circulation
Self-care while you decide
- ✓Keep clean and covered with a non-stick dressing
- ✓Photograph weekly for comparison
- ✓See a clinician at the 4-week mark, sooner if growing
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Check my sore that won't heal →Frequently Asked Questions
The most common causes are Basal cell carcinoma, Squamous cell carcinoma, Venous leg ulcer, Diabetic foot ulcer. Because the buttock sees prolonged sitting and sweat and tight clothing, these triggers also raise the likelihood of a sore that won't heal appearing here.
Most non-healing sores are harmless. However, you should seek a dermatology review if you notice: Any sore that hasn't healed in 4 weeks; Recurs in the exact same spot; Bleeds, oozes or has rolled raised edges.
Use the ABCDE rule — Asymmetry, irregular Borders, multiple Colours, Diameter over 6 mm, and Evolution (any change). On the buttock, also watch for sores that don't heal, pearly bumps with visible blood vessels, or any lesion that bleeds repeatedly. A free AI mole checker can help you track changes over time.
Try: Keep clean and covered with a non-stick dressing; Photograph weekly for comparison; See a clinician at the 4-week mark, sooner if growing. Avoid picking or squeezing, and photograph the area today so you can compare in 2–4 weeks.
Book a review if the spot is growing, changing colour, bleeding, painful, or persists more than 4–6 weeks. Same-day care is needed for spreading redness with fever, breathing trouble, or non-blanching purple spots.
Yes — our free AI mole and skin checker analyses a photo against thousands of dermatology images and flags ABCDE-style concerns within seconds. It is a screening aid, not a diagnosis, and we always recommend confirming any concerning result with a clinician.
Sore that won't heal elsewhere on the body
Medical disclaimer: This page is for general information and is not a substitute for professional medical advice, diagnosis or treatment. Always consult a qualified clinician about any concerning skin change. ScanSkinAI is a screening aid, not a diagnostic device.