May be no symptoms
While a classic finding is a black, bleeding mole, that isn't always the case.
Melanomas can sometimes be pinkish (amelanotic melanoma
), rather than brown or black. Best to have someone look over your back regularly, keeping the abcde's of melanoma in mind -- assymetry, irregular border, color (often more than one color in same lesion), diameter (>6mm), and evolving.