Some symptoms of skin cancer in early stages are a sore that does not heal and the spread of pigment from the border of a spot, states American Cancer Society. Redness or new swelling outside of the border of a spot is also a potential sign of skin cancer.
Symptoms of early stage melanoma skin cancer can be remembered as the ABCDE rule, according to American Cancer Society. A stands for asymmetry, meaning one part of a birth mark or mole is not the same as the other. B stands for border, meaning the border of a mole is ragged or blurred. C stands for color, as the color of a spot or mole should be the same all over. D stands for diameter, as the spot should not be larger than a pencil eraser. Lastly, E stands for evolving. Any mole that changes in size, shape or color should be evaluated by a doctor.