signs of internal melanoma
Signs and symptoms of melanoma skin cancer. Unusual moles, sores, lumps, blemishes, markings, or changes in the way an area of the skin looks or feels may be a sign of melanoma or another type of skin cancer, or a warning that it might occur.ther warning signs are: 1  A sore that does not heal. 2  Spread of pigment from the border of a spot into surrounding skin. 3  Redness or a new swelling beyond the border. 4  Change in sensation â itchiness, tenderness, or pain. 5  Change in the surface of a mole â scaliness, oozing, bleeding, or the appearance of a bump or nodule.