Skin spots can change over time to develop into skin cancers and it is especially important to keep a track of those changes. The features that you should look out for include asymmetry, border irregularity, colour that is not uniform, and a diameter that is greater than 6 mm (about the size of a pencil eraser). If at any time you feel uncomfortable or you see that your skin spot is changing, irritating or bleeding, we recommend that you visit a medical specialist without hesitation.