An acrochordon is a benign fibroepithelial outgrowth — a small fold of redundant skin on a narrow stalk. They are among the most common lesions in dermatology, and among the least medically alarming. What makes them worth an article is that they are also one of the more informative things the skin does.
Key Facts
- 50–60% — the proportion of adults who develop at least one acrochordon in their lifetime, with likelihood rising after the fourth decade
- 2–6 mm — the typical diameter, presenting as soft pedunculated papules on a narrow stalk
- Neck, axillae, groin, eyelids — the intertriginous sites where friction and skin-on-skin contact concentrate them
- OR 1.89 — the odds ratio for diabetes mellitus in people with skin tags compared with those without, in a matched clinico-morphological study
- 58 vs 12 — patients with overt diabetes among 110 people with acrochordons versus 110 matched controls in a case-control study
- IGF-1R and IGF-2R — insulin-like growth factor receptors, expressed significantly more in acrochordon tissue than in controls
- Nevi, neurofibromas, seborrhoeic keratoses — the three lesions most often mistaken for skin tags, and the reason identification precedes removal
- No malignant potential — acrochordons themselves are benign — the clinical value lies in what their number and timing indicate
What they are, mechanically
Skin tags are loose fibrous tissue covered by epidermis, projecting on a stalk. They concentrate in intertriginous areas — neck, axillae, groin, eyelids — where skin moves against skin. Roughly half to two-thirds of adults develop at least one, and the likelihood climbs after the fourth decade. In isolation, one is a non-event.
The association that changes the conversation
Numerous epidemiological studies link acrochordons with type 2 diabetes, dyslipidaemia, insulin resistance and polycystic ovarian syndrome. A clinico-morphological study of 150 cases reported an odds ratio of 1.89 for diabetes in people with skin tags. A separate case-control study of 110 patients against 110 matched controls found 58 with overt diabetes in the acrochordon group versus 12 among controls, with significantly higher fasting glucose, BMI, insulin resistance, total cholesterol, LDL and triglycerides.
There is a plausible mechanism underneath the correlation. Tissue expression of insulin-like growth factor receptors IGF-1R and IGF-2R is significantly higher in acrochordon tissue than in controls, which fits a model where raised circulating insulin drives fibroepithelial proliferation through IGF signalling.
A skin tag is a dermatological non-event and a metabolic signal at the same time. Removing twenty of them while asking nothing about why there are twenty is treating the wrong organ.
What this means in practice
It does not mean everyone with a skin tag has a metabolic problem. Plenty of people develop one or two from friction alone and nothing else is going on. What it means is that the pattern carries information: a sudden crop, a steadily rising count, or lesions appearing alongside acanthosis nigricans is a finding, not just a cosmetic complaint. The review literature is explicit that multiple or recurrent lesions frequently signal underlying metabolic derangement and warrant further evaluation.
So the useful clinic visit does two things. It removes what is there, and it asks whether the count is telling you something you would rather know now than in five years.
What else looks like a skin tag
Melanocytic nevi, neurofibromas and pedunculated seborrhoeic keratoses all present as small raised lesions and all can be mistaken for acrochordons. Rarer adnexal and premalignant tumours enter the differential too. This is the same principle that governs mole removal: a lesion is identified before it is destroyed, because destruction removes the chance to identify it.
Certain syndromes — Gardner, Birt-Hogg-Dubé, tuberous sclerosis — are associated with skin-tag-like lesions, which is another reason an unusual distribution or an unusual age of onset gets examined rather than assumed.
Removal, and what it does not do
Removing an acrochordon is quick and the lesion does not come back at that site. New ones can appear elsewhere, because removal addresses the lesion and not the tendency. If friction, weight or insulin resistance is unchanged, the process that produced the first crop is still running.
Aftercare matters more in Fitzpatrick III to V skin, where any inflammatory insult can leave temporary post-inflammatory pigmentation — the same consideration that shapes how pigment is treated generally, covered in our melasma article.
Where they cluster, and why
The distribution is not random. Neck, axillae, groin and eyelids share one feature: skin folds against skin, and friction is repeated thousands of times a day. Mast cell mediators released by chronic minor trauma have been proposed as one contributor, which fits both the sites involved and the observation that lesions often appear where clothing, jewellery or a collar rubs.
This gives a modifiable handle that removal alone does not. Reducing friction at a site — a looser collar, a different bra band, addressing weight where that is the driver — changes the input. It will not clear existing lesions, but it acts on the process that keeps producing them.
What not to do
Home removal with thread, scissors or over-the-counter freezing kits risks bleeding, infection and scarring, and permanently forecloses the option of identifying a lesion that turns out not to have been a skin tag. The procedure is short in clinic because it is done under sterile conditions with the lesion looked at first — not because it is trivial.
References
- Skin Tag (Acrochordon). StatPearls, NCBI Bookshelf. 2025. NBK547724
- A Clinico-Morphological Study of Acrochordons and the Association With Diabetes Mellitus. PubMed. 2025. PMID 40062084
- Acrochordons as a Cutaneous Sign of Metabolic Syndrome: A Case-Control Study. PubMed Central. PMC3991940
- Köseoğlu HG, et al. The role of insulin-like growth factor in acrochordon etiopathology. BMC Dermatology. 2020;20:14. PMC7640457
- Skin Manifestations of Insulin Resistance: From a Biochemical Stance to a Clinical Diagnosis and Management. PubMed Central. PMC5336429
If skin tags have been multiplying rather than staying static, that pattern is worth an assessment rather than only a removal.
Book My AppointmentFrequently Asked Questions
Acrochordons themselves lack malignant potential. The clinically relevant point is different: multiple or rapidly appearing lesions are repeatedly associated in the literature with insulin resistance, type 2 diabetes, dyslipidaemia and polycystic ovarian syndrome, so a sudden crop is worth mentioning to a doctor rather than only removing.
Removal treats the lesion present, not the tendency to form them. If the underlying drivers — friction, weight, insulin resistance — are unchanged, new ones continue to appear. That is not a failure of the procedure; it is the procedure doing only what it can do.
Not until it has been looked at properly. Melanocytic nevi, neurofibromas and pedunculated seborrhoeic keratoses can all resemble acrochordons, and the differential matters because those lesions are managed differently. Identification comes before removal.
Small lesions on a narrow stalk generally heal with minimal trace. Larger or broader-based lesions, and lesions in areas under tension, are more likely to leave a residual mark, and lesions in Fitzpatrick III to V skin can develop temporary post-inflammatory pigmentation.
No. Home removal risks bleeding, infection and scarring, and it eliminates the chance to identify a lesion that was not an acrochordon. The procedure is quick in clinic precisely because it is done under proper conditions.