What does melanoma on the arm look like?

Melanoma can present in a variety of ways, according to WebMD. It may be a large mole, a dark spot with several colors and uneven edges, or as several bumps.

Paying attention to changes on the skin can help identify potential signs of melanoma. Monitor moles for any change in size or shape, as this can be a sign of melanoma warns WebMD. New characteristics such as bleeding, scabbing or itching on or around a mole are also possible danger signs. Spots that are irregular in shape or color may also point to melanoma. These changes of the skin can happen anywhere on the body, not just the arms and legs, so it is advisable to check less obvious areas such as the genitals, the palms and behind the ears.