Skin tags show up on the neck more than almost anywhere else because it’s a prime spot for repeated friction. The skin on your neck constantly rubs against itself, shirt collars, necklaces, and scarves, and that ongoing irritation is the main trigger. But friction alone doesn’t explain the full picture. Hormones, insulin levels, and body composition all play a role in who gets them and how many appear.
Friction Is the Primary Trigger
Skin tags are small, soft growths that hang off the skin by a thin stalk. They form in areas where skin folds against itself or rubs against clothing, which is why the neck, armpits, groin, and under the breasts are the most common locations. Your neck is particularly vulnerable because it’s almost never at rest. Turning your head, wearing collared shirts, or layering necklaces all create low-grade, repetitive irritation throughout the day.
That friction appears to trigger a process in the deeper skin layers where connective tissue cells begin to overgrow, forming a small protrusion that eventually becomes a skin tag. Once a tag forms, continued contact with clothing or jewelry can make it grow larger over time. Tight collars and necklaces that repeatedly hit the same spot are especially likely to cause problems, which is why some dermatologists recommend loosening your neckline or removing jewelry that rests directly on the skin if you’re prone to developing them.
Insulin and Metabolism Play a Bigger Role Than Most People Realize
Friction sets the stage, but the underlying reason some people are far more prone to skin tags than others often comes down to what’s happening metabolically. High insulin levels and the growth factors that travel alongside insulin stimulate skin cells called fibroblasts to multiply faster than normal. That extra cell growth makes it easier for skin tags to form wherever friction occurs.
The connection to metabolic health is strong enough to be clinically meaningful. A case-control study from Eastern India found that people with skin tags were over 11 times more likely to have metabolic syndrome (a cluster of conditions including high blood sugar, high blood pressure, and abnormal cholesterol) compared to people without skin tags. The two metabolic factors most closely tied to skin tag development were a larger waist circumference and low levels of HDL cholesterol, the protective type. Interestingly, the number or size of your skin tags doesn’t seem to predict how severe the metabolic issue is. Even a few small tags can signal the same underlying pattern.
This doesn’t mean every skin tag is a warning sign. They’re extremely common and often purely cosmetic. But if you’re noticing a sudden crop of new skin tags, especially alongside weight gain or a family history of type 2 diabetes, it’s worth having your blood sugar and cholesterol checked.
Hormonal Changes Can Trigger New Growth
Pregnancy is one of the most common times for skin tags to appear seemingly out of nowhere. Fluctuations in estrogen and progesterone stimulate the same type of skin cell growth that insulin does, and when you combine those hormonal shifts with the weight changes and increased skin friction that come with pregnancy, neck skin tags become very common. Many of these tags shrink or stop growing after delivery, though they don’t always disappear on their own.
Hormonal shifts during perimenopause and with certain medications can have a similar effect, which is why some people notice new skin tags during midlife even if they’ve never had them before.
Who Gets Them Most
Skin tags become more common with age, and most people develop at least a few by middle adulthood. They affect people of all body types, but they’re significantly more frequent in people carrying extra weight, particularly around the midsection, because of increased skin-on-skin contact in folds and higher circulating insulin levels. People with obesity are especially prone, and frequent skin irritation in skin folds has been specifically identified as a contributing cause in this group.
There does appear to be a family component. If your parents had a lot of skin tags, you’re more likely to develop them yourself, though researchers haven’t pinpointed specific genes responsible. It’s possible that what runs in families is not the skin tags themselves but the underlying traits that promote them, like skin type, body fat distribution, or insulin sensitivity.
How to Tell a Skin Tag From Something Else
Skin tags are soft, flesh-colored or slightly darker, and they dangle from the skin on a narrow stalk. That stalk is the key feature. Warts, by contrast, are rough-textured, sit flat against the skin, and are caused by a virus. Moles are clusters of pigmented cells that appear as flat or slightly raised dark spots without a stalk.
Most skin tags are easy to identify on your own, but if a growth is changing color, bleeding, firm to the touch, or growing rapidly, it’s worth having a dermatologist take a look. The ABCDE rule used for moles (asymmetry, irregular borders, color variation, diameter larger than a pencil eraser, and evolving appearance) is a useful screening tool for any skin growth that concerns you.
Removal Options and What to Avoid
Skin tags are benign and don’t need to be removed for health reasons. But if one on your neck catches on jewelry, gets irritated by your collar, or simply bothers you, a dermatologist can remove it quickly in the office.
The three standard methods are freezing (applying liquid nitrogen to destroy the tissue, which then falls off as a scab heals), electrical destruction (using a tiny needle to zap the tag, with healing in one to three weeks), and snipping (numbing the area and cutting the tag off with sterile scissors). All three are fast, and recovery is minimal.
What you should avoid is removing skin tags at home with over-the-counter products. The FDA has not approved any at-home skin tag removal products and actively warns against using them. Wart removers are a common temptation, but skin tags are soft tissue, not hard like warts, and the chemicals can damage surrounding skin, causing scarring or irritation that’s worse than the original tag.
Reducing Your Risk
You can’t completely prevent skin tags if you’re genetically prone to them, but you can reduce how many develop. On the friction side, wearing looser collars, minimizing heavy necklaces that sit directly on the skin, and keeping neck folds dry all help. On the metabolic side, maintaining a healthy weight and keeping blood sugar stable address the internal growth signals that make your skin more reactive to friction in the first place. Neither approach eliminates skin tags entirely, but together they can slow the rate at which new ones appear.