The first sign of a melanoma is usually the appearance of a new spot or a change in an existing freckle or mole.
The change may be in size, shape and/or colour and the change is normally noticed over months rather than days. A normal freckle or mole is usually small and has an even colour and a smooth edge.
When you notice a change, you should see your doctor so they can diagnose whether it is a melanoma. The process for dealing with melanoma involves diagnosis, treatment and follow up care.