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Skin tags (acrochordons) are small, benign growths that affect up to 46% of the population. Here’s what causes them and when to see a doctor.
What Are Skin Tags?
Small, soft, flesh-colored growths that hang from the skin by a thin stalk (peduncle). Usually 2–5mm but can grow larger. Painless and harmless. Most common on neck, armpits, under breasts, groin, and eyelids—areas where skin rubs against skin.
Causes
Friction: Skin-on-skin or clothing rubbing is the primary trigger.
Genetics: If your parents had skin tags, you’re more likely to develop them.
Hormones: Pregnancy, hormonal fluctuations increase risk. Common during second trimester.
Insulin resistance: Strong correlation with Type 2 diabetes and metabolic syndrome.
Age: Most common after 40. Skin loses elasticity, creating folds where friction occurs.
Weight: Higher BMI increases skin folds and friction areas.
When to Worry
See a dermatologist if: The growth changes color (especially dark brown or black), bleeds without cause, grows rapidly, feels hard or fixed to the skin, or is painful. These could indicate something other than a benign skin tag.
Skin tags themselves never become cancerous. However, some skin cancers can mimic skin tags in early stages. When in doubt, get it checked.
Prevention
Maintain healthy weight, keep skin folds dry, wear smooth fabrics that reduce friction, manage blood sugar levels, and use anti-chafing products in friction-prone areas.