Skin tags form when excess cells are produced in the top layers of the skin. While it’s not completely clear why this happens, skin tags tend to form in areas where skin rubs against each other or against an object, such as a piece of jewelry or an article of clothing. Certain health conditions and genetic components also appear to be linked to skin tags.
Factors that increase the risk of developing skin tags include:
• Age — The risk of skin tags increases with age, and they’re especially common in people over 50. However, after the age of 70, people don’t tend to develop new skin tags.
• Family history — People who have a relative with skin tags have a higher chance of developing them.
• Diabetes — People with diabetes are more prone to skin tags. This may be related to insulin resistance, although it hasn’t been confirmed.
• Obesity — People who are overweight and obese have a greater chance of developing skin tags. This may be related to insulin resistance. It may also be due to an increase in skin folds, which create more opportunity for friction.
• Birt-Hogg-Dubé syndrome — A rare disorder, Birt-Hogg-Dubé syndrome affects the skin, producing a number of different skin growths, including skin tags.
• Metabolic syndrome — People with certain conditions such as high blood pressure and high cholesterol have an increased risk of developing skin tags.
• Pregnancy — Skin tags tend to be more common during pregnancy, possibly due to hormonal changes as well as increased skin friction from weight gain.