It is unclear exactly what causes skin tags, but several contributing factors have been proposed. Skin tags are composed of collagen fibers, blood vessels, and an outer layer of skin. Collagen—a protein found throughout the body—provides structure and strength, and along with blood vessels, forms the bulk of these benign growths. While the precise mechanism of skin tag formation remains uncertain, friction appears to play a significant role, particularly since skin tags often develop in areas where skin rubs against skin, such as in folds or creases.
Friction from constant rubbing or irritation can stimulate the growth of these small tags. As a result, skin folds—such as those found in the neck, armpits, groin, and under the breasts—are common sites for skin tags. Overweight individuals are more prone to developing skin tags, not only because excess skin creates more folds and friction but also because obesity itself has been linked to metabolic changes that may influence skin tag formation.
In addition to friction, several other factors have been correlated with the occurrence of skin tags:
- Human Papillomavirus (HPV):
Research has indicated a possible link between HPV and the development of skin tags, suggesting that the virus might contribute to their formation in some individuals. - Obesity:
People with obesity tend to have more skin folds and therefore more areas of friction, which can lead to an increased likelihood of developing skin tags. Moreover, obesity is often associated with hormonal and metabolic changes that might play a role. - Diabetes and Insulin Resistance:
There is a higher prevalence of skin tags among individuals with diabetes and those who exhibit insulin resistance. These conditions may alter the skin's biology and contribute to the growth of skin tags. - Aging:
As people age, the skin undergoes changes, including a decrease in collagen production and reduced elasticity. Older individuals tend to develop more skin tags, perhaps due to these changes and the cumulative effects of friction over time. - Pregnancy:
During pregnancy, hormonal fluctuations can lead to changes in the skin, making it more susceptible to various growths, including skin tags. The increased levels of certain hormones combined with weight gain and the development of additional skin folds can contribute to the formation of skin tags in pregnant women.
It’s important to note that skin tags can also develop without any identifiable reason. In many cases, they simply appear over time without a clear cause, often in areas where skin naturally folds. While the exact triggers remain partially understood, factors like friction, hormonal changes, metabolic conditions, and even viral infections seem to increase the likelihood of their development.
Because skin tags are benign, they typically do not require medical treatment unless they cause irritation, discomfort, or aesthetic concerns. If necessary, options for removal are available and can be discussed with a qualified healthcare provider.
