the Increase in Moles: When to Be Concerned

Increase in the number of moles?

Hello Doctor: In the past six months, I have suddenly developed around fifteen new moles on my limbs.
I already had several moles on my body, but the sudden increase in number has left me a bit puzzled.
Upon closer inspection, the new moles are all flat and do not exhibit asymmetry, itching, or redness.
Their colors range from pure black to light brown, and their sizes vary from as small as a pinhead to approximately 0.2 cm in diameter.
Although after researching I feel it may not be serious, I would still like to ask the doctor if the increase in the number of moles is something to be concerned about.
Thank you for your response!

Charlotte, 20~29 year old female. Ask Date: 2018/07/04

Dr. Wu Yuxin reply Dermatology

Moles should be examined one by one and discussed individually; the number of moles is not the cause of any lesions.

Reply Date: 2018/07/04

More Info

Dear Patient,
Thank you for reaching out with your concerns regarding the sudden increase in the number of moles on your body. It’s understandable to feel anxious when you notice changes in your skin, especially when it comes to moles, as they can sometimes be indicative of underlying health issues.

Firstly, it’s important to recognize that moles, or nevi, are common skin growths that can vary in size, shape, and color. Most people have between 10 to 40 moles on their bodies, and it is not unusual for new moles to develop, especially during childhood and adolescence. However, the appearance of new moles in adulthood, particularly if they arise suddenly or in large numbers, can warrant further evaluation.

In your case, you mentioned that you have noticed about fifteen new moles on your arms and legs over the past six months. The fact that these moles are flat, symmetrical, and do not exhibit any itching, redness, or other concerning symptoms is a positive sign. The colors you described—pure black and light brown—are also common for benign moles. The size variation, from very small (like a pencil point) to about 0.2 cm in diameter, is also typical.

However, there are certain characteristics of moles that should raise concern, often summarized by the ABCDE rule:
1. Asymmetry: One half of the mole does not match the other half.

2. Border: The edges are irregular, ragged, or blurred.

3. Color: The color is not uniform and may include shades of brown, black, or even red, white, or blue.

4. Diameter: The mole is larger than 6mm (about the size of a pencil eraser).

5. Evolving: The mole changes in size, shape, or color over time.

Since you have not observed any of these concerning features, it is likely that your new moles are benign. However, the sudden increase in the number of moles is something that should not be overlooked. It is advisable to schedule an appointment with a dermatologist for a thorough skin examination. They can assess the new moles and determine if any further action is necessary, such as monitoring them over time or performing a biopsy if there are any suspicious characteristics.

Additionally, it’s worth noting that factors such as sun exposure, genetics, and hormonal changes can influence the development of moles. If you have a family history of skin cancer or if you have experienced significant sun exposure, these factors may also play a role in your skin changes.

In conclusion, while the characteristics of your new moles seem reassuring, the sudden increase in their number does warrant a professional evaluation. Regular skin checks, especially if you notice changes, are an important part of maintaining skin health. Please do not hesitate to reach out to a healthcare provider for further guidance and peace of mind.

Thank you for your inquiry, and I wish you the best in your health journey.

Sincerely,
Doctor Q&A Teams

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