What causes moles on the body?
Melasma is a common pigmentation phenomenon on the skin. Most people will have moles on their bodies. However, the causes and types of moles and whether they need attention have always been topics of concern to everyone. This article will combine the hot discussions and medical knowledge in the past 10 days to provide you with a detailed analysis of the causes, classification and related precautions of black moles.
1. Causes of formation of moles
Black nevus (also known as nevus) is formed by the accumulation of melanocytes in the skin. The following are common causes of moles:
| Reason | Description |
|---|---|
| genetic factors | People with more moles in their family may be more likely to have moles in their offspring. |
| UV irradiation | Long-term exposure to the sun, ultraviolet rays can stimulate the proliferation of melanocytes, leading to the formation of moles. |
| Hormone changes | Changes in hormone levels in the body during puberty, pregnancy, or when taking hormone medications may trigger the appearance of new moles. |
| skin aging | As we age, skin metabolism slows down and melanin tends to accumulate to form moles. |
2. Types of moles
According to medical classification, moles can be divided into the following common types:
| Type | Features | risk level |
|---|---|---|
| Junctional nevus | Flat or slightly raised, darker in color, more common in children and teenagers. | low risk |
| compound nevus | Slightly raised, varying shades of color, common in adulthood. | low risk |
| intradermal nevus | The bulge is obvious and the color is lighter. It is more common in adults. | low risk |
| dysplastic nevus | Irregular in shape, uneven in color, and may increase in size. | medium to high risk |
3. Which moles should I be wary of?
Most moles are benign, but a few may turn into melanoma. Here are the red flags to watch out for (ABCDE rules):
| Features | Description |
|---|---|
| A (Asymmetry) asymmetry | The shape of the mole is asymmetrical and the sides are inconsistent. |
| B (Border) Irregular edges | Edges are blurry, jagged, or matte. |
| C (Color) uneven color | Moles can come in different shades or colors. |
| D (Diameter) diameter is too large | Over 6 mm in diameter (about the size of a pencil eraser). |
| E (Evolution) changes | A mole that has recently changed significantly in size, shape, or color. |
4. How to prevent malignant transformation of moles?
1.sun protection: Ultraviolet rays are an important cause of malignant transformation of moles. You need to apply sunscreen daily to avoid prolonged exposure to the sun.
2.avoid friction: For moles that appear on areas prone to friction (such as palms and soles of feet), it is recommended to consult a doctor whether they need treatment.
3.Regular self-examination: Check the moles all over your body every month, record the changes in size and color, and seek medical attention promptly if any abnormalities are found.
4.Professional inspection: High-risk groups (such as those with a family history of melanoma) should undergo regular dermoscopy.
5. Popular discussions in the past 10 days: Black moles and health
Recently, discussions about moles on social platforms have mainly focused on the following points:
1.Is "mole spotting" safe?: For laser or liquid mole spotting, you need to choose a regular institution to avoid infection or scarring.
2.Black mole suddenly becomes larger: Many netizens shared cases of delayed treatment due to neglect of changes in moles, triggering vigilance.
3.Sun protection misunderstandings: You need to use sunscreen even on cloudy days, as ultraviolet rays may still irritate moles.
Summary
The formation of moles is related to genetics, ultraviolet rays, hormones and other factors. Most of them are nothing to worry about, but you need to be alert to abnormal changes. Self-examination through ABCDE rules, combined with sun protection and regular inspections, can effectively reduce risks. If you have any concerns, it is recommended to seek medical diagnosis as soon as possible.
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