Moles
At a Glance
Moles, medically known as melanocytic nevi, are common benign skin growths that develop when pigment-producing cells called melanocytes grow in clusters rather than being distributed evenly throughout the skin. Most adults have between 10 and 40 moles, which can appear anywhere on the body and vary in color from pink to dark brown or black. While the vast majority of moles are harmless, some individuals seek removal for cosmetic reasons or to address moles that cause irritation from friction with clothing or jewelry.
- Most adults have between 10 and 40 common moles, which is considered normal[2]
- The vast majority of moles are benign and will never become cancerous[4]
- Most moles appear during the first two decades of life and may change gradually over time[1]
- A common mole is usually smaller than 5 millimeters and has uniform color and distinct edges[4]
- Cosmetic mole removal by a dermatologist typically results in minimal scarring[6]
Symptoms
- Round or oval shape with smooth, distinct edges
- Uniform color ranging from pink, tan, brown, to black
- Flat or raised (dome-shaped) appearance
- Size typically smaller than 5 millimeters (about the width of a pencil eraser)
- May darken with sun exposure or hormonal changes
- Some moles may have hair growing from them
- Texture can be smooth, wrinkled, or slightly rough
When to Seek Professional Care
- A mole shows asymmetry (one half differs from the other half)
- The border is irregular, ragged, notched, or blurred
- The color is uneven with shades of brown, black, tan, white, red, or blue
- The diameter is larger than 6 millimeters (about the size of a pencil eraser)
- The mole is evolving, changing in size, shape, or color, or looks different from other moles
- A mole that recurrently bleeds, crusts over, or will not heal
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Causes
- Clusters of melanocytes forming during skin development
- Genetic predisposition to developing moles
- Sun exposure and ultraviolet radiation
- Hormonal changes during puberty or pregnancy
- Fair skin with less protective melanin
How We Can Help
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Prognosis
- Most moles remain stable and benign throughout life
- Moles may naturally lighten or disappear with age
- Cosmetic removal procedures typically result in minimal scarring when performed by a skilled and experienced dermatologist
- Regular monitoring can detect any concerning changes early
Frequently Asked Questions
What are moles and why do they form?
Moles, or melanocytic nevi, are common benign skin growths that form when melanocytes (pigment-producing cells) grow in clusters instead of being spread evenly throughout the skin. They can develop due to genetic factors, sun exposure, and hormonal changes. Most people develop moles during childhood and adolescence, with the average adult having 10 to 40 moles.
Are moles normal to have?
Yes, moles are very common and usually harmless. Almost every adult has at least a few moles, and having 10 to 40 moles is considered normal for adults with light skin. Most moles remain stable throughout life and never cause any health concerns. However, monitoring moles for changes is still recommended as part of regular skin health awareness.
What are the options for cosmetic mole removal?
Several dermatological procedures can remove moles for cosmetic reasons. Shave excision involves using a surgical blade to remove raised moles at skin level without stitches. Surgical excision completely removes the mole and surrounding tissue with stitches. Laser removal uses concentrated light to break down pigment cells in small, flat moles. A dermatologist experienced in cosmetic mole removal can recommend the best approach based on the mole's characteristics and location.
Does cosmetic mole removal leave scars?
When performed by a dermatologist that is experienced in cosmetic mole removal, mole removal typically results in minimal scarring. The type of scar depends on the removal method and location. Shave excision often leaves a round scar that fades with time. Surgical excision leaves a thin line scar that usually fades over time. Scars from mole removal on the face often heal with excellent cosmetic results due to the face's good blood supply.
What changes in a mole indicate a need for evaluation?
The ABCDE rule outlines warning signs that warrant professional evaluation: Asymmetry (one half differs from the other), Border irregularity (ragged or blurred edges), Color variation (multiple shades or colors), Diameter larger than 6 millimeters, and Evolving (changes in size, shape, color, or bleeding and crusting over weeks or months). Any mole showing these features warrants prompt evaluation by a dermatologist.
Is it concerning to develop new moles as an adult?
While most moles develop during childhood and adolescence, new moles can occasionally appear in adulthood. However, a new mole appearing after age 30 warrants attention and evaluation by a dermatologist. Adults noticing new moles or significant changes to existing moles benefit from professional assessment to ensure the growth is benign.
What can be done about moles that cause irritation?
Moles in areas where they experience friction from clothing, jewelry, or shaving can become irritated or uncomfortable. A dermatologist can evaluate whether removal would be beneficial. Removal of moles causing chronic irritation is often straightforward and can prevent ongoing discomfort. The removal method depends on the mole's size, location, and characteristics.
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Sources & References
This article draws from 6 peer-reviewed sources.
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Medically reviewed by Dr. Julia Tzu, MD, FAAD, FACMS · Last reviewed: 2026-02-08