1. How Are Moles Formed?

On the human body, benign skin conditions such as freckles, moles, skin tags, papillomas, and pigmentation changes often appear. However, in some cases, these skin lesions may occur abnormally—especially moles—which can sometimes be a sign of a dangerous cancer that few people suspect.

Many believe that moles are harmless, but sometimes they can be malignant tumors.

Normally, pigment-producing cells called melanocytes are evenly distributed across the skin, giving it its natural color. In certain cases, however, these cells cluster together under the epidermis, forming a mole.

In most cases, these moles are harmless and do not affect health. They vary in shape, size, and location on the body. Some people choose to have moles removed for cosmetic reasons—especially if they appear in large numbers or on the face—even though they pose no health risk.

2. How to Identify Cancerous Moles

The number of moles on a person’s body varies depending on their genetic makeup. Moles can appear anywhere, either singly or in clusters. You can assess abnormalities by observing changes in size, shape, color, location, or evolution over time.

Characteristics of Normal Moles
Before learning about cancerous moles, you should understand what a normal, benign mole looks like:

• Present at birth or develop during childhood.

• Small in size, typically less than 0.6 cm in diameter.

• Round and symmetrical in shape, usually black or brown with a uniform color.

• Edges are smooth, even, and continuous—neither irregular nor blurred.

• Do not change in shape, size, or color over time.

Characteristics of Cancerous Moles



Cancer-warning moles often appear unexpectedly after birth or during adulthood and may show:

• Large size, with a diameter greater than 6 mm.

• Uneven color, often a mix of various shades.

• Changes over time—such as frequent scaling, rapid growth, or turning red—which can be signs of cancer progression.

• Irregular shape with no symmetry between sides.

• Raised above the skin with blurred or poorly defined borders.

• Itching at the site of the abnormal mole.

Since cancer signs vary from person to person, if you notice unusual new moles, it is best to get them checked to know your exact health condition.

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3. How to Treat Cancerous Moles

If you discover suspicious moles, visit a medical facility for evaluation and testing. In some cases, the doctor may recommend a biopsy.

Benign Moles
If the mole is benign and the patient does not wish to have it removed, no treatment is necessary as it poses no health risk. However, if the mole affects appearance, a doctor may recommend surgical removal or laser treatment to restore normal skin.

Many people choose to remove harmless moles purely for cosmetic reasons.

Malignant Moles
If the mole is malignant (melanoma), treatment will depend on the stage of the disease and the extent of tumor spread. Common treatments include surgical excision, which may be combined with chemotherapy or radiation therapy before or after surgery if needed.

Patients should note that melanoma can progress rapidly and cause serious health issues, especially if the skin is frequently exposed to ultraviolet rays or harmful chemicals without protection. If your job requires frequent exposure to such factors, you should use protective clothing and equipment.

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With the above information, it’s clear that abnormal moles—though they may seem harmless—can sometimes pose serious health risks. Therefore, if you detect unusual changes in a mole, do not ignore them; visit a reputable medical facility for examination as soon as possible.