Benign moles

Moles, also called melanocytic naevi, are very common and most are completely harmless. They are small collections of pigment producing cells in the skin and can be present from birth or appear gradually during childhood and early adulthood.

Benign moles vary in size, shape and colour. They may be flat or slightly raised, smooth or slightly warty, and can range from light brown to very dark brown. Some moles have visible hairs, which is reassuring rather than worrying. It is also normal to have many moles scattered over the body, especially on sun exposed sites.

What does a typical benign mole look like?

A typical benign mole:

  • Has a regular, rounded or oval outline
  • Is symmetrical when you imagine a line through the middle
  • Has an even colour throughout
  • Is usually smaller than the size of a pencil rubber
  • Does not itch, bleed or crust for no clear reason

Many people notice small changes in their moles over time, especially during teenage years, pregnancy or after sun exposure. Slow, minor changes are usually part of normal ageing of the mole. Sudden or marked changes should always be reviewed.

Why benign moles still need monitoring

Although benign moles do not cause problems themselves, people with many moles or with a family history of skin cancer have a higher risk of developing melanoma. Regular self examination helps you become familiar with your own moles so that you can spot anything new or different at an early stage.

As a guide, concerning changes include:

  • A new mole in adult life that looks different from your others
  • Growth or expansion of part of a mole
  • Change in shape, outline or symmetry
  • New darkening, patchy colour or several colours in one mole
  • Persistent itching, tenderness, bleeding or crusting

If a mole looks unusual or is changing, it is important to have it checked by a specialist. A benign diagnosis can be very reassuring, and if there is any doubt, a small operation can remove the mole for examination under the microscope.

Assessment and treatment options

At a consultation, a dermatologist will examine your skin and assess any moles of concern. This often includes a mole check of the whole body and may be supported by a dermatoscopic examination using a specialised magnifying device to look at structures within the mole that cannot be seen with the naked eye.

If a mole is clearly benign, no treatment is needed. Removal may be considered if:

  • There is uncertainty about the diagnosis
  • The mole keeps catching or being traumatised by shaving or clothing
  • The appearance is causing significant cosmetic concern

The most common procedure is a minor surgical excision under local anaesthetic, allowing the mole to be checked by a pathologist to confirm that it is benign.

When to seek help

You should seek specialist advice if you notice any changes in an existing mole, develop a new mole that stands out from your others, or have any concerns about a particular area of skin.

If you are worried about any mole, please book a specialist mole check or contact us via the contact page.