Why Do We Get Skin Tags? Causes And Risk Factors

Skin tags are small, soft growths that hang off the skin, usually on a thin stalk. They form when extra cells grow in the outer layer of skin, and they are not cancer. Anyone can get them, but they show up most often in people who are middle-aged or older, in people with extra body weight, and in skin folds where the skin rubs together.

Why Do We Get Skin Tags Causes And Risk Factors

Skin tags are benign growths, meaning they are not harmful and do not turn into cancer. They are made of normal skin tissue — collagen and blood vessels covered by a layer of skin — that has grown into a small, soft pouch.

The most accepted explanation for why they form is friction. When skin rubs against skin, or against clothing or jewelry, the outer layer of skin can respond by forming these small growths. This is why they cluster in areas where skin folds touch: the neck, armpits, groin, under the breasts, and eyelids.

Friction alone does not tell the whole story. Two people can have the same skin folds and only one develops tags. That gap points to other factors — genetics, hormones, and metabolic conditions — that raise the odds. Researchers have studied these links for decades, and while the associations are fairly consistent, the exact mechanism is still not fully understood.

One clarification worth making: skin tags are not a sign that something is wrong with your skin care routine. They are not caused by poor hygiene, and scrubbing harder will not prevent them.

What Are Skin Tags Made Of?

A skin tag is a piece of normal skin that has grown outward into a soft, fleshy bump. Inside it are loose fibers of collagen, a few tiny blood vessels, and a covering of ordinary skin cells. There is no cyst, no fluid, and no infection.

Most tags are the same color as the surrounding skin, though some appear slightly darker. They are usually painless. A tag can become sore if it twists on its stalk and loses blood flow, or if clothing or a seatbelt catches it.

Size varies widely. Many are just a few millimeters across — about the size of a grain of rice. Some grow larger over time. They can be smooth or slightly wrinkled, and they often sit on a narrow stem called a peduncle.

Because a skin tag is built from normal skin tissue, it behaves differently from a mole or a wart. Moles contain pigment-producing cells, and warts are caused by a virus. Skin tags are neither.

Are Skin Tags Genetic?

Genetics clearly play a role. Skin tags tend to run in families, and some research points to specific gene variations that influence how skin cells grow and how collagen is built.

This does not mean you are guaranteed to get them if a parent had them. It means your baseline tendency is higher. Two siblings can share the same genes and have very different numbers of tags, because other factors — weight, hormones, and age — also shape whether tags appear.

There is also a rare inherited condition in which people develop many skin tags along with other growths. That condition is uncommon and is diagnosed by a doctor, not by counting tags at home.

If skin tags run in your family, that is useful information. It does not change how they are treated, but it does explain why they may keep coming back after removal.

Do Skin Tags Mean You Have Diabetes or Insulin Resistance?

This is one of the most common questions about skin tags, and the honest answer is: the link is real but not a diagnosis.

Multiple studies have found that people with skin tags are more likely to also have insulin resistance, type 2 diabetes, or metabolic syndrome. Insulin resistance is a condition where the body’s cells respond poorly to insulin, so the pancreas has to produce more of it to keep blood sugar in range.

The association is consistent enough that some clinicians consider a large number of skin tags a reason to check blood sugar and other metabolic markers. But having skin tags does not mean you have diabetes. Many people with skin tags have completely normal blood sugar.

What the evidence supports is this: skin tags are a visible clue that may be worth mentioning to your doctor, especially if you have other risk factors for diabetes such as a family history, higher body weight, or high blood pressure. It is a conversation starter, not a diagnosis.

Hormones and Life Stages That Raise the Risk

Hormonal shifts appear to influence skin tag development. Pregnancy is a common time for tags to appear or multiply, likely because of changes in estrogen, progesterone, and growth factors that affect skin.

This is one reason skin tags are more common in women overall, though men get them too. The hormonal link also helps explain why tags sometimes shrink or disappear after pregnancy — though this is not guaranteed, and many persist.

Other life stages matter as well. Skin tags become more common with age, particularly after age 40. They are rare in young children. Growth hormone and insulin-like growth factor have both been studied in connection with skin cell growth, and some research suggests they may play a part.

Because pregnancy and hormone changes are involved, no clinical guidelines exist for preventing skin tags in pregnant women. The evidence is not strong enough to support a specific prevention approach for that group.

Weight, Age, and Friction: What Actually Raises Your Risk

Several factors consistently show up in the research on skin tags. None of them guarantees you will get them, and none of them guarantees you will not.

• Higher body weight. People with obesity tend to develop more skin tags, likely because extra skin folds create more friction and because weight is linked to insulin resistance.
• Age. Risk rises steadily after age 40. Tags are uncommon in children.
• Skin folds. Areas where skin rubs together — neck, armpits, groin, under the breasts — are the most common sites.
• Family history. A parent or sibling with skin tags raises your odds.
• Pregnancy. Hormonal changes during pregnancy often trigger new tags.
• Certain medical conditions. Insulin resistance, type 2 diabetes, and metabolic syndrome are associated with more skin tags.

One factor that does not appear to cause skin tags is poor hygiene. There is no evidence that dirty skin produces tags, and no evidence that washing more often prevents them.

It is also worth separating correlation from cause. Higher body weight is linked to more skin tags, but that does not mean losing weight will make existing tags vanish. It may reduce the chance of new ones forming in friction areas, but this has not been proven in controlled trials.

Can You Prevent Skin Tags?

There is no proven way to prevent skin tags entirely. Because the causes involve genetics, hormones, and age — none of which you can control — prevention is limited.

What may help, based on the friction theory, is reducing skin-on-skin rubbing in fold areas. This is reasonable and low-risk, but it has not been tested in large trials, so it should be framed as common sense rather than proven prevention.

• Keep skin folds clean and dry.
• Wear loose clothing that does not dig into the neck, armpits, or groin.
• Avoid tight collars, heavy necklaces, and waistbands that rub.
• If you have diabetes or insulin resistance, managing blood sugar is good for your overall health, though it is not proven to prevent skin tags specifically.

If you are prone to skin tags, they may keep appearing over time even after removal. That is normal and does not mean the removal failed.

When Should a Skin Tag Concern You?

Most skin tags are harmless and need no treatment. The main reason to see a doctor is to confirm the growth is actually a skin tag and not something else.

See a doctor if a growth:

• Bleeds, oozes, or crusts
• Changes color, size, or shape quickly
• Is firm, fixed, or irregular in shape
• Grows back after removal
• Causes pain, especially if it twists

These signs do not mean the growth is cancer, but they do mean it should be checked. Skin tags themselves do not become cancerous. However, some skin cancers can look like a tag or a mole at first, which is why a changing growth deserves a professional look.

Removal is typically done by a doctor through freezing, cutting, or burning. Over-the-counter kits exist, but they carry a risk of infection, scarring, and misidentifying the growth. For anything unusual, a medical evaluation is the safer path.