Moles in children are generally benign, but still should be monitored for changes. Moles may be present at or shortly after birth, but also may develop during childhood and adolescence. Existing moles tend to grow proportionally as the child grows. Some moles may slowly darken, and others may lighten over time. While melanoma (a type of skin cancer arising from a mole) is rare in children, it is helpful for parents to be aware of any changes in color, size or shape of moles on their child. Most moles are round with a sharply defined border and single color. They may be flat or raised, but should maintain their symmetrical character and even coloring. Generally, no treatment is required unless a mole appears to be abnormal or is changing rapidly.