Skin tags linked to insulin resistance are small, soft, flesh-colored or brown growths that dangle from the skin on a thin stalk. They look identical to ordinary skin tags, but what sets them apart is their number and location. A person with insulin resistance tends to develop clusters of them in skin folds, particularly around the neck, armpits, and groin, rather than just one or two isolated growths.
Size, Shape, and Color
Skin tags are ovoid, smooth, and soft to the touch. They range from tiny bumps about 1 to 2 mm wide (roughly the size of a pinhead) to filiform growths around 5 mm long, and occasionally larger bag-like pouches up to 1 to 2 cm. Nearly all of them attach to the skin through a narrow, fleshy stalk called a peduncle, which is why they seem to hang or dangle rather than sit flat.
Color varies. They can match your surrounding skin tone exactly, appear darker brown, or occasionally look reddish. On darker skin, they tend to be hyperpigmented, meaning noticeably darker than the surrounding area. The surface is smooth and slightly wrinkled, not rough or scaly like a wart.
Where They Show Up
Insulin resistance skin tags cluster in areas where skin rubs against skin. The neck and nape are the most common spots, followed by the armpits, groin folds, under the breasts, and along the eyelids. If you’re noticing five or more skin tags concentrated in your neck or armpit area, that pattern is more suggestive of an underlying metabolic issue than a single skin tag on your chest or back.
How They Differ From Warts and Moles
Skin tags are easy to confuse with other common growths, but a few details help tell them apart. Warts have a rough, bumpy surface and sit flat against the skin. Moles are clusters of pigmented cells that form a defined dark brown spot, usually with a smooth or slightly raised surface but no stalk. Skin tags, by contrast, are soft, hang freely on their narrow stalk, and move when you brush them. If a growth feels rough to the touch or is firmly attached with a broad base, it’s likely not a skin tag.
Why Insulin Resistance Causes Them
When your body becomes resistant to insulin, the pancreas compensates by producing more of it. That excess insulin circulating in the bloodstream doesn’t just affect blood sugar. It also stimulates growth factor receptors in the skin, essentially telling skin cells in friction-prone areas to multiply faster than normal. The result is these small, benign overgrowths of tissue.
This is why the sheer number of skin tags matters more than their appearance. A clinical study found that people with more than five skin tags in the neck or armpit region were 7.5 times more likely to have significant insulin resistance compared to people without them, independent of whether they had a diabetes diagnosis, their age, or their sex. The association also held regardless of waist-to-hip ratio, meaning skin tags aren’t simply a marker of carrying extra weight.
The Acanthosis Nigricans Connection
Skin tags linked to insulin resistance often appear alongside another visible skin change called acanthosis nigricans. This shows up as dark, velvety patches of thickened skin in the same areas where skin tags cluster: the back of the neck, armpits, and groin. If you’re seeing both soft, dangling growths and darkened, textured patches in your skin folds, the combination is a strong visual signal of insulin resistance. Research has found that people with both conditions carry a significantly higher risk of metabolic syndrome and type 2 diabetes, along with elevated blood pressure, abnormal cholesterol, and higher BMI.
Some estimates suggest that as many as three out of four people who present with skin tags also have diabetes.
Do They Go Away if Insulin Resistance Improves?
Existing skin tags generally don’t shrink or fall off on their own, even if you improve your insulin sensitivity through diet, exercise, or medication. They’re structural overgrowths of skin tissue, not temporary swelling. What improving insulin resistance can do is slow or stop the formation of new ones. If you notice your skin tags are multiplying, that’s worth paying attention to as a sign that your metabolic health may be moving in the wrong direction.
Removal is straightforward if they bother you. A dermatologist can clip, freeze, or cauterize them in a brief office visit. They’re painless unless they catch on clothing or jewelry, which can cause irritation and minor bleeding. Skin tags are benign and don’t become cancerous, but any new or changing growth on your skin is worth having a doctor examine to rule out other conditions.
What to Watch For
The key pattern that points toward insulin resistance rather than ordinary skin tags is multiplicity and location. A single skin tag on your eyelid or under your arm is common in the general population, especially with age. But if you count five or more clustered around your neck, armpits, or groin, particularly if you also notice darkened, thickened skin in those same folds, those visual signs together suggest your insulin levels may be chronically elevated. A simple blood test can confirm whether insulin resistance is present.