White patches on the skin are the main sign of vitiligo. These patches are more common in areas where the skin is exposed to the sun. The patches may be on the hands, feet, arms, face, and lips. Other common areas for white patches are:
The armpits and groin (where the leg meets the body)
Around the mouth
People with vitiligo often have hair that turns gray early. Those with dark skin may notice a loss of color inside their mouths.