Symptoms of advanced melanoma can develop years after the original melanoma was diagnosed and removed. For some people, a change to an existing mole or freckle, or a change in normal-looking skin is the first sign. Tests then show that the melanoma has spread to another part of the body (secondary cancer), although there may not be obvious symptoms at this stage.
We have more information about the difference between a normal mole and a melanoma.
For a small number of people, tests may show that they have a secondary melanoma even if they have had no signs of a previous melanoma or an abnormal-looking mole.
The symptoms of advanced melanoma depend on which part(s) of your body the melanoma has spread to.