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About Cancer

Melanoma skin cancer

Melanoma is a type of cancer that starts in cells called melanocytes. These are found in the skin, the layer of tissue lining some parts of your body (mucous membrane) and the eye.

This section is about melanoma skin cancer.

Read about other types of melanoma

There are 2 main types of skin cancer: Non melanoma skin cancer (which includes basal cell skin cancer, squamous cell skin cancer and other rare types) and melanoma skin cancer.

Find out about non melanoma skin cancer

What is melanoma skin cancer?

Melanoma skin cancer starts in skin cells called melanocytes. You can get it anywhere on your skin including in a mole, on your palms, the soles of your feet and under your nails.

Symptoms of melanoma skin cancer

Symptoms include changes to a mole, freckle or normal patch of skin. Doctors use a checklist of signs to look out for. But it helps to know what your skin normally looks like.

Pictures of abnormal moles, melanoma and skin changes

These pictures are only a guide to what melanoma skin cancers may look like. If you’re worried about a skin change it is important to get it checked by your GP.

Risks and causes of melanoma skin cancer

The risk of developing melanoma skin cancer depends on many things including how much ultraviolet radiation you get from the sun and your skin type.

Getting diagnosed with melanoma skin cancer

If you have symptoms of melanoma skin cancer you should see your GP. They might ask you to have some tests and may refer you to a specialist.

Stages and types of melanoma skin cancer

The stage of a melanoma skin cancer tells you how deeply it has grown down into the skin. It also tells you if it has spread elsewhere in your body and how far.

Last reviewed: 07 Feb 2025

Next review due: 07 Feb 2028

Page Credits: 

This section has been written, reviewed and updated by Cancer Research UK’s Patient Information Web Team. Thanks to the expert medical professionals and people affected by cancer who have helped to review this information.

  • Dr Victoria Akhras, Consultant Dermatologist

  • Dr Ricky Frazer, Consultant Oncologist

  • Mr Myles Smith, Consultant Surgical Oncologist and General Surgeon

  • our lay reviewers

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