Skin tags, or acrochordons as they are also called, are small, harmless growths on the skin. They tend to grow in armpits, on the neck, around the groin, on the eyelids and under breasts. Almost everybody is affected by skin tags at some point in their lives and a person can have anywhere from 1-100 skin tags. The cause for skin tags is not completely clear, but they appear to occur when skin rubs against other skin or clothes. Since they often occur in skin folds, obese people are more prone to having skin tags than the general population.