Skin tags show up on the neck because it’s one of the body’s highest-friction zones, where skin constantly folds and rubs against itself during normal movement. About one in two adults develops skin tags at some point, and the neck is one of the most common locations. But friction alone doesn’t explain why they appear when they do. Weight changes, hormonal shifts, cholesterol levels, and even certain viruses all play a role in triggering that extra cell growth.
Friction Is the Primary Trigger on the Neck
Skin tags form when the body produces extra cells in the top layers of skin, and they tend to cluster in areas where skin rubs against itself. Your neck checks every box: it creases when you look down, folds against your chin, and moves constantly throughout the day. Necklaces, shirt collars, and scarves add another layer of repetitive rubbing that can kickstart or accelerate growth.
This is why skin tags favor the same predictable spots on everyone: the neck, armpits, under the breasts, eyelids, and groin folds. If you’ve recently started wearing a new necklace, changed your collar style, or gained weight that deepened the skin folds on your neck, any of those could explain a sudden crop of new tags.
Weight and Cholesterol Matter More Than You’d Think
Friction explains where skin tags form, but metabolic factors help explain why some people get many more than others. Research published in The Journal of Clinical and Aesthetic Dermatology found that people who were overweight had a 4.7 times higher likelihood of developing multiple skin tags compared to people at a normal weight. High cholesterol showed a statistically significant association as well.
The connection makes sense biologically. Excess weight creates deeper skin folds and more friction points, especially around the neck and jawline. But it goes beyond mechanics. Higher body fat is linked to elevated insulin levels, and insulin is a growth factor that can stimulate skin cells to multiply. This is why dermatologists sometimes view a sudden burst of skin tags as a signal worth investigating. Multiple new skin tags, particularly in someone who hasn’t had them before, can be an early marker of insulin resistance or shifting cholesterol levels.
Hormonal Changes Can Trigger New Growth
Pregnancy is one of the clearest examples of hormones driving skin tag formation. Estrogen levels surge during pregnancy, and a 2010 study found a possible link between elevated estrogen and skin tag development. A separate 2019 study identified an even stronger connection with leptin, a hormone secreted by fat tissue in both the pregnant person and the fetus. Leptin directly promotes the growth and multiplication of skin cells, which may explain why some women notice a sudden wave of new tags during the second and third trimesters.
Hormonal shifts outside of pregnancy can have similar effects. Perimenopause, polycystic ovary syndrome, and thyroid dysfunction all alter the hormonal environment in ways that may promote skin tag growth. If new tags on your neck coincide with other hormonal symptoms like irregular periods, fatigue, or unexplained weight changes, those dots may be worth connecting with your doctor.
Age and Genetics Play a Role
Skin tags become increasingly common as you get older, with prevalence climbing steadily from your 30s onward. The reason is partly cumulative friction over decades, partly the metabolic changes that come with aging, like rising insulin resistance and shifting hormone levels. Anyone of any gender can develop them, but older adults are significantly more likely to have multiple tags.
Family history matters too. If your parents dealt with skin tags, your odds are higher. The tendency to produce extra skin cells in response to friction and metabolic triggers appears to run in families, though researchers haven’t isolated a single gene responsible.
A Possible Viral Connection
One lesser-known factor involves human papillomavirus, or HPV. A study in the Egyptian Journal of Medical Microbiology tested tissue from 30 patients with skin tags and found low-risk HPV DNA (types 6, 11, or both) in about 73 percent of them. By contrast, normal skin sampled just five centimeters away from the tags tested positive only 13 percent of the time. The difference was highly significant statistically.
These are low-risk HPV strains, not the types associated with cancer. But their strong presence in skin tag tissue, compared to surrounding healthy skin, suggests the virus may contribute to the overgrowth of cells that forms a tag. This area of research is still developing, and HPV likely acts as one factor among many rather than a standalone cause.
How to Tell Skin Tags From Other Growths
Skin tags are soft, flesh-colored, and hang from the skin on a thin stalk. They’re typically small, ranging from a pinhead to a few millimeters across, though some grow larger. They move freely when you touch them and don’t change color over time.
A few other growths can appear on the neck and look similar at first glance. Seborrheic keratoses are waxy, slightly raised bumps that look like they’ve been “pasted on” the skin. They tend to be brown or tan, have a rough or scaly surface, and sit flat rather than dangling. Moles are usually darker, smoother, and don’t hang on a stalk. Warts are firmer with a rougher texture. If a growth on your neck is changing color, growing rapidly, feels hard, or bleeds without being snagged on something, it’s worth having a dermatologist look at it to rule out anything more concerning.
Removal Options and What to Avoid
Skin tags are benign and don’t need to be removed for medical reasons. But if they’re catching on necklaces, getting irritated by collars, or simply bothering you cosmetically, removal is straightforward. A dermatologist can freeze them off with liquid nitrogen (cryotherapy), burn them with a small electric probe (electrocautery), or snip larger ones with scissors or a scalpel. Most neck skin tags are small enough that the procedure takes seconds and heals within a week or two.
What you shouldn’t do is try to remove them at home. Skin tags have their own blood supply and sometimes contain nerve endings. Cutting one off with scissors or tying it with string risks uncontrolled bleeding, infection, and scarring. The same goes for over-the-counter removal kits, which can damage the surrounding skin on a sensitive area like the neck. UCLA Health specifically warns against all forms of at-home removal for these reasons.
Reducing New Skin Tags on Your Neck
You can’t always prevent skin tags, but you can reduce the conditions that promote them. Keeping skin folds dry and minimizing friction helps. On the neck specifically, this means being mindful of tight collars, heavy necklaces, and rough fabrics that rub repeatedly against the same spots. Applying a light powder to reduce moisture in neck creases during hot weather can also lower friction.
The bigger lever for most people is metabolic. Maintaining a healthy weight reduces both the mechanical friction from deeper skin folds and the insulin-driven cell growth that fuels tag formation. If you’re noticing a sudden increase in skin tags alongside weight gain, that’s a meaningful signal about what’s happening inside your body, not just on its surface. Getting your blood sugar and cholesterol checked can help you understand whether the tags are part of a larger metabolic picture worth addressing.