The most common sign of melanoma is the appearance of a new mole or a change in an existing mole, most commonly on the back, legs, arms or face,although it can be on any part of the body. Melanomas usually have an irregular shape and uneven colouring. They may also be larger than normal moles and can sometimes be itchy or bleed. The main risk factors include genetic predisposition (fair skin, red hair, large number of moles), UV exposure and immunosuppression. The main treatment for melanoma is surgical removal of the lesion. If treated at an early stage, this is usually successful.

ABCDE melanoma checklist

Asymmetrical – melanomas have two very different halves and an irregular shape

Border – melanomas have an uneven or ragged border

Colours – melanomas will be a mix of two or more colours

Diameter (or Dynamic) – melanomas are larger than 6mm (1/4 inch) in diameter

Enlargement or Elevation – a mole that grows over time or is raised is more likely to be a melanoma.