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The information contained on this page is provided as general health information and is not intended to substitute as medical advice and direction from your physician or health care provider. Please direct any questions related to your health care provider. In an emergency, call 9-1-1 or go to the nearest emergency center.

Skin conditions

A few common skin conditions include moles, birthmarks, age spots, and warts.

Moles are colored spots on the skin, formed by cells containing the dark pigment, melanin. While generally harmless, some moles can change shape and color, or start bleeding and require immediate evaluation.

Some birthmarks are simply moles that are present at birth, called a pigmented birthmark. Others result from the rapid growth of blood vessels in a localized area, called red birthmarks.

When a person becomes older, they may develop age spots. Age spots are patches of increased pigmentation on the skin's surface, like freckles.

Warts are benign, or non-cancerous, growths of skin caused by a virus.