The cause of acrochordons is unknown, however there are several theories. Irritation or friction to the skin, as occurs with skin rubbing on skin in body folds, may play a role in their formation. Acrochordons are found more commonly in people who are overweight or have diabetes. This may be due to body habitus (more skin folds), but some people think insulin resistance may somehow contribute to the development of these harmless tumors. A study of 49 patients with acrochordons showed that the human papilloma virus (HPV) was present in a high percentage of growths, suggesting the virus plays a role in development. It is also possible that acrochordons are genetic or simply due to normal aging and loss of elastic tissue. There is a genetic disorder called Birt-Hogg-Dube Syndrome that is characterized by numerous skin tags along with other skin and systemic findings.
Hormone elevations, such as those seen during pregnancy, may cause an increase in the formation of skin tags, as skin tags are more frequent in pregnant women. Tags are essentially harmless and do not have to be treated unless they are bothersome. Skin tags that are bothersome may be easily removed during or after pregnancy, typically by a dermatologist.

What's to know about bumps on the skin? Bumps on the skin can be harmless. However, they can also point to more severe conditions, such as skin cancer. Learn all about common types of bumps found on the skin in this MNT Knowledge Center article, from skin tags to melanomas, including their causes, treatment options, and when to see a doctor. Read now
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