Moles: Risks of Picking and Skin Cancer Concerns

Mole-related issues?

Hello, doctor.
Today I suddenly noticed a mole that I feel I haven't seen before, and I ended up scratching it...
While I was scratching, I suddenly remembered that I shouldn't do that.
I looked it up online and read that scratching could lead to worsening and even cancer? Now that mole seems to look like it's split in half (it's located above my knee, and when I bend my leg, the skin tightens, making the mole appear divided with only a small gap).
I would like to ask if I should just leave it alone and it will be fine? I saw that someone else had asked if scratching could lead to cancer, and you mentioned it wouldn't.
I'm a bit confused, thank you for your response!

Nìmíng, 20~29 year old female. Ask Date: 2023/03/19

Dr. Wu Yuxin reply Dermatology

Picking will not cause cancer.

Reply Date: 2023/03/19

More Info

When it comes to moles and their potential risks, particularly in relation to skin cancer, it's essential to understand a few key points. First, it's important to clarify that while picking at a mole or a skin lesion can lead to irritation or infection, it does not directly cause skin cancer. Skin cancer, particularly melanoma, is primarily associated with genetic factors, sun exposure, and other environmental influences rather than the act of picking at a mole.

Moles, or nevi, are common skin growths that can vary in size, shape, and color. Most moles are benign, meaning they are not cancerous. However, changes in a mole's appearance—such as asymmetry, irregular borders, multiple colors, or an increase in size—can be warning signs of melanoma, a serious form of skin cancer. The ABCDE rule is a helpful guideline for evaluating moles:
- Asymmetry: One half of the mole does not match the other.

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

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

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

- Evolving: The mole is changing in size, shape, or color.

In your case, you mentioned that you noticed a mole that seemed new and that you picked at it, leading to a change in its appearance. While it's understandable to be concerned, the act of picking at the mole itself is unlikely to have caused any cancerous changes. However, it can lead to inflammation, scarring, or infection, which may require medical attention if it becomes painful or shows signs of infection (such as increased redness, swelling, or pus).

If the mole appears to be splitting or changing in a way that worries you, it is advisable to refrain from touching it further and to consult a dermatologist. A dermatologist can perform a thorough examination and, if necessary, a biopsy to determine whether the mole is benign or if further action is needed.
In summary, while picking at a mole does not cause skin cancer, it is crucial to monitor any changes in moles and seek professional evaluation if you notice any concerning signs. Regular skin checks, especially if you have a history of atypical moles or skin cancer in your family, can help catch any potential issues early. Remember, early detection is key in successfully treating skin cancer.

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