There are many different kinds of moles which can appear to be flat, raised, brown, black, pink, or flesh colored. Few people are born with moles while the majority develop moles during childhood and adolescence. Lighter skin typed individuals are more prone to developing moles than those that are darker skinned. Moles may change over time in size and color as a result of environmental factors such as sun exposure and hormones, as in pregnancy. While most moles are harmless, some may have a tendency to become irregular in shape, color and size. These are known as atypical or dysplastic moles. Dysplastic moles may herald an increased risk of the deadliest form of skin cancer known as melanoma. Surgical excision may be required to remove these moles. It is important to have an annual total body skin examination to see if you have any irregular moles that may needed to be removed.