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How is moles formed

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Additionally, wearing clothing to reduce exposed skin or wearing a hat can help protect skin from radiation that may cause skin cancer. It is important to familiarize yourself with your blemishes and moles. Most people have a small number of moles. You should be aware of the size, shape, color, and whether or not they are raised, because a change in the appearance of a mole can be a sign of skin cancer.

Any noticeable and quick changes should be reported to your physician and followed with regular skin checks. Skin cancer is eminently treatable in most cases if it is discovered early. If you experience a change in appearance or the development of a new mole or blemish, it is important to seek evaluation.

The American Association of Dermatologists publishes the ABCDE's of Melanoma describing five features that should warrant evaluation by a skin expert or medical professional. If any of these are true, you should have your mole looked at by a medical professional, preferably a dermatologist.

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Try our AI assistant here. Informed by current CDC guidelines. Skip to main content Skip to accessibility services Buoy Logo. Nav Close Icon. Nav Open Icon. Health articles Chevron Icon. Featured topics. Symptom checker. Editorial standards. Who we serve Chevron Icon. Brokers and Consultants. Solutions Chevron Icon. Care Navigation. Sections Icon. What are moles? When to see a doctor. Skin Conditions. Buoy Chat Icon.

Symptom Checker. Verified By Experts Icon. Verified by experts 6 min read. No Ads. Ezekiel Richardson, MD. Jeffrey M. Last updated February 4, Heart Icon.

Speech Bubble Icon. Share Icon. Facebook Icon. LinkedIn Icon. Pinterest Icon. Pocket Icon. Share Link Icon. Copied to clipboard. Table of Contents. Mole questionnaire Use our free symptom checker to find out if you have mole. What are some symptoms of moles? Common skin changes As a person ages, more changes may appear in the skin.

Common types of skin changes are: Birthmarks: These may appear as flat "stains" in the skin or as raised clusters made up of tiny blood vessels. Moles: These are small irregularities that originate in the pigment-producing cells in the skin. They can be almost any shape or color but are normally no larger than one-quarter inch across. Skin tags: These are little irregular flaps of skin, like a flattened mole attached on only one side.

Keloids: This is a dark, fibrous form of scar tissue that forms after a skin wound, either from trauma or from surgery. Flat moles: This is a typical mole, sometimes referred to as junctional nevi.

Slightly raised moles: This type is referred to as a compound mole. Rubbery textured moles: Intradermal nevi rarely occur. Painless moles: Usually moles do not hurt, they do not bleed, and they grow very slowly if at all. Benign moles: Usually the only symptom of a benign mole is its appearance which is stable over the life course. Raised moles A raised mole e. What causes a mole? Skin type Generally speaking, what we recognize as moles are more common in individuals with larger amounts of nevus cells and lightly pigmented skin.

Sunlight Exposure to sunlight can trigger moles in individuals that are genetically predisposed. Treatment options and prevention for moles Moles are common skin changes and are commonly benign. Evaluation Most moles or nevi do not develop malignancy throughout the lifespan. Avoid UV radiation Proper application of sunscreen and the use of a proper strength of sunscreen are important to preventing benign moles and even normal skin from developing into skin cancer.

Skin checks It is important to familiarize yourself with your blemishes and moles. When to seek further consultation for moles If you experience a change in appearance or the development of a new mole or blemish, it is important to seek evaluation.

Asymmetry: Could the mole be divided into two or more equal appearing parts? Border: Is the border of the mole irregular, or faint on one side and defined on another? Color: Is the mole a single color or different colors? Diameter: Is the mole greater than 6 mm in diameter?

Evolving size: Have you seen recent changes in size or shape? Share your story. Submit story. Request sent successfully. An error occurred, please try again later. He currently practices as a hospitalist at Newton Wellesley Hospital. Melanin is a natural pigment that gives your skin its color.

It's produced in cells called melanocytes. Moles are caused when cells in the skin melanocytes grow in clusters or clumps. Melanocytes are distributed throughout your skin and produce melanin, the natural pigment that gives your skin its color.

Melanoma is the main complication of moles. Some people have a higher than average risk of their moles becoming cancerous and developing into melanoma. Factors that increase your risk of melanoma include:. The following measures can help limit the development of moles and the main complication of moles — melanoma.

Become familiar with the location and pattern of your moles. Regularly examine your skin to look for changes that may signal melanoma. Do self-exams once a month, especially if you have a family history of melanoma. With the help of mirrors, do a head-to-toe check, including your scalp, palms and fingernails, armpits, chest, legs, and your feet, including the soles and the spaces between the toes.

Also check your genital area and between your buttocks. Talk with your doctor about your risk factors for melanoma and whether you need a professional skin exam on a routine basis.

Take measures to protect your skin from ultraviolet UV radiation, such as from the sun or tanning beds. UV radiation has been linked to increased melanoma risk. And children who haven't been protected from sun exposure tend to develop more moles. Mayo Clinic does not endorse companies or products. Advertising revenue supports our not-for-profit mission. This content does not have an English version.

This content does not have an Arabic version. Overview Moles Open pop-up dialog box Close. Moles Moles are usually harmless. Request an Appointment at Mayo Clinic. Skin layers and melanin Open pop-up dialog box Close.

Skin layers and melanin Melanin is a natural pigment that gives your skin its color. Share on: Facebook Twitter. Show references Moles. Accessed Oct. Argenziano G, et al. Twenty nevi on the arms: A simple rule to identify patients younger than 50 years of age at higher risk for melanoma. European Journal of Cancer Prevention. Wise J. Number of moles could predict breast cancer risk.

Wolff K, et al. Melanoma precursors and primary cutaneous melanoma. New York, N. Prevention guidelines. Skin Cancer Foundation. Gibson LE expert opinion.


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