How are moles formed?

2 min read
Doctor reviewed by Dr. Vijay Sampath, M.B.B.S, M.S (Gen Surg), DNB (Gen Surg), MRCS (Edinburgh). Last reviewed: September 2025.

HOW ARE MOLES FORMED?

The exact origin of moles is unknown. In most cases, it’s believed to be a mixture of genetic conditions and sun exposure.

Moles appear in infancy and puberty, and their sizes and colours change as you get older. When the hormone levels shift, such as during pregnancy, new moles are normal.

The majority of moles have a diameter of less than 1/4 inch. The colour of a mole can vary from pink to dark brown or black. They can appear everywhere on your body, in groups or alone.

Almost any mole is harmless (noncancerous). Adults, on the other hand, are more likely than children to develop cancerous moles. When a new mole grows as you get older, or if an existing mole varies in shape, visit a dermatologist to ensure it isn’t cancerous.

how are moles formed?

 

Congenital moles are moles that appear at birth.

Birthmarks are moles that come in various sizes, shapes, and colours.

A congenital mole affects 0.2 to 2.1 percent of all children. When an infant is older, say, 10 to 12 years old and more able to handle local anaesthetic, certain birthmarks can be handled for aesthetic purposes.

There are several treatment services available, including:

  • Electrocautery
  • Top skin layers are shaved (surgical excision).
  • Laser ablation for lightening organic peel for lightening (Fractional CO₂ laser)

Adults with bigger congenital moles are more likely to develop cancer (4 to 6 percent lifetime risk). A doctor should be contacted if a birthmark varies in scale, colour, shape, or discomfort.

 

To find out more about how moles are formed, you can consult us at www.baclinic.sg/. Find out the price of mole removal in Singapore

 

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    Disclaimer: This article is provided for general educational and informational purposes only and should not be relied on as medical advice, diagnosis, or treatment recommendation. Information may not be exhaustive and may not apply to every individual. A proper consultation with a qualified doctor is recommended to assess suitability, risks, and the most appropriate treatment options for your needs.

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