Moles are very common. however, we also have what we called melanoma wherein it has a variety of forms and can appear anywhere on the body. it usually start with a change in normal-looking skin. This change usually looks like a dark area or an abnormal new mole. or other melanomas develop from an existing mole, freckle, birthmark or coloured spot. This change in a mole, freckle, birthmark or coloured spot can occur over several months to years. In men it is most common on the back. while in women it is common on the legs. it is actually a malignant form of mole. these are the following signs & symptoms for melanoma: a new mark or spot on the skin, a mole or spot that is changing in size, shape, colour or height (elevation or how much it is raised above the skin). a mole or spot that looks different from all of the other spots on your skin, a mole or spot that is asymmetric (one side of the spot does not match the other), a mole or spot that doesn’t have a well-defined border (the edges are irregular, ragged, notched or blurred), mole or spot that is not the same colour all over or has changed colour, It may be shades of brown, black, pink, red, white or blue. a mole or spot that is more than 6 mm across (about the size of a pencil eraser), a sore that does not heal, if there is change in sensation of a mole or spot, including itching, tingling, tenderness or pain, a mole or spot that is crusted or bleeding spread of pigment from the border of a spot to surrounding skin, new moles that grow around an existing mole, redness or a new swelling beyond the border of a spot or mole, a growth under a fingernail or toenail or a new pigmented line in a nail. if you have these please try to consult an oncologist for further work up.