The biggest warning sign for skin cancer is any change in your skin. For people of color, the places on the body where skin cancer most often occurs are less sun-exposed areas, like the lower extremities. The spots to check most frequently are spots that you may not always think of:
Palms of hands.
Soles of feet.
Fingernails and toenails.
Inside the mouth.
Inside the nose.
Groin and genital areas.