Why do skin tags grow

Content on WhatAnswers is provided "as is" for informational purposes. While we strive for accuracy, we make no guarantees. Content is AI-assisted and should not be used as professional advice.

Last updated: April 8, 2026

Quick Answer: Skin tags, medically known as acrochordons, are benign growths that typically develop in areas where skin rubs against skin or clothing, such as the neck, armpits, and groin. They affect approximately 46% of the general population, with prevalence increasing with age, particularly after age 40. While the exact cause is unclear, they are strongly associated with insulin resistance, obesity, and genetic factors, and they are more common in people with type 2 diabetes. Most skin tags are harmless and do not require treatment, but they can be removed for cosmetic reasons or if they become irritated.

Key Facts

Skin tags affect approximately 46% of the general population, with higher rates in older adults.
They are most common in people aged 40-60, with prevalence increasing with age.
Skin tags are strongly linked to insulin resistance and type 2 diabetes, occurring in up to 75% of diabetic patients.
Obesity is a major risk factor, with studies showing a correlation between higher BMI and increased skin tag development.
Genetic factors play a role, as skin tags often run in families and are more common in certain ethnic groups.

Overview

Skin tags, or acrochordons, are small, soft, benign skin growths that typically appear as flesh-colored or slightly darker protrusions connected to the skin by a thin stalk. They range in size from 1-5 mm, though some can grow larger, and are most commonly found in areas of friction such as the neck, armpits, groin, and under the breasts. Historically documented since ancient times, with references in medical texts dating back to the 1st century AD, skin tags were formally described in modern dermatology in the early 20th century. They affect both men and women, with some studies suggesting a slight female predominance, and are particularly prevalent in middle-aged and older adults. While generally harmless, their appearance can cause cosmetic concerns, and they may become irritated or painful if caught on clothing or jewelry. In rare cases, multiple skin tags can be associated with underlying conditions like polycystic ovary syndrome (PCOS) or metabolic syndrome.

How It Works

Skin tags develop through a process involving the proliferation of collagen fibers and blood vessels within the outer layers of the skin, specifically the epidermis and dermis. The exact mechanism is not fully understood, but it is believed that friction or rubbing in skin folds triggers localized growth, possibly due to increased cell turnover or irritation. Hormonal factors, such as elevated levels of insulin-like growth factor (IGF-1), may stimulate cell division and collagen production, contributing to tag formation. This is supported by their association with insulin resistance, where high insulin levels can promote tissue growth. Additionally, genetic predisposition influences the skin's response to these triggers, with certain individuals more prone to developing tags. The growth process is typically slow, with tags forming over weeks to months, and they do not spread or become cancerous. Removal methods, if desired, include cryotherapy (freezing), cauterization (burning), surgical excision, or ligation (tying off the blood supply), all of which are minor procedures with high success rates.

Why It Matters

Understanding why skin tags grow is important for both medical and cosmetic reasons. Medically, their presence can serve as a marker for underlying health issues, such as insulin resistance, diabetes, or metabolic disorders, prompting early screening and intervention. For instance, a sudden increase in skin tags might indicate undiagnosed type 2 diabetes, leading to timely management. Cosmetically, skin tags can affect self-esteem and quality of life, especially if they are visible or cause discomfort, making removal a common dermatological procedure. In 2020, over 1 million skin tag removals were performed in the United States alone, highlighting their social significance. Research into skin tags also contributes to broader knowledge of skin biology and growth regulation, with potential insights into benign tumor formation. Overall, while skin tags are generally harmless, awareness of their causes and associations helps in preventive health care and improves patient outcomes.