Most moles are harmless. A mole that changes should be checked.
- Typical adult
- 10 to 40 moles
- Removal
- Local anesthetic
- Tracking
- Mole mapping
Common and atypical moles
Common moles are evenly pigmented, symmetrical and clearly separate from the surrounding skin. They are generally benign.
Atypical moles are usually larger, fade into the surrounding skin, contain a mix of colours and tend to appear on sun-exposed skin. They are more likely than common moles to become melanoma, so they should be monitored and examined regularly.
Any mole that changes in shape or colour may indicate melanoma and should be assessed promptly; a biopsy may be needed.
Why moles develop
People develop moles through childhood, adolescence and pregnancy, and most adults have between 10 and 40. Genetics, ultraviolet radiation and trauma all play a role.
Older people, and those with fair skin and light or red hair, tend to have more moles.
How moles are removed
Most moles never need to be removed. When they are, it is usually for cosmetic or comfort reasons.
- Shave removal with a blade
- Punch removal with a rounded blade
- Surgical excision with a scalpel
All three are outpatient procedures under local anesthetic, and recovery is usually short; surgical excision may need stitches and more aftercare. Atypical moles are excised and sent for biopsy.
Monitoring over time
People with atypical moles should watch for changes and have their skin examined regularly. Mole mapping with total body photography helps track changes over time.
Dr. Guo explains 8 common skin growths
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Book appointmentMoles frequently asked questions
What is a mole?
A mole (nevus) is a cluster of pigmented cells called melanocytes. Most adults have between 10 and 40 moles, and most are harmless.
When should a mole be checked by a dermatologist?
Have a mole checked if it changes in size, shape or colour, has an irregular border or several colours, is larger than the others, or starts to itch or bleed. Any mole that has changed in appearance should be assessed promptly.
How are moles removed?
Moles can be shaved off, removed with a small round punch blade, or surgically excised with a scalpel. These are outpatient procedures done under local anesthetic.
Will mole removal leave a scar?
Any mole removal leaves a small mark. How it looks depends on the size and location of the mole, the removal method and how your skin heals.
Are removed moles tested?
Atypical or suspicious moles are excised and sent for biopsy so they can be examined under a microscope.