If the mole is flat, it may stay that way but become wider, it adds. It's not just size and shape to watch out for melanomas can also become swollen and sore. This can cause them to become itchy ...

In addition to the changes highlighted above, you should also watch out for a mole that is swollen, sore, or crusty. The NHS said melanoma is often caused by ultraviolet light (UV) from the sun ...