What causes black moles?

Many of our friends often have some melanin deposits in various parts of the body. Sometimes there will be some hair in the middle of the melanin, which is what people usually call moles. Moles can be congenital or acquired, and usually do not cause people some obvious discomfort. Let us understand some of the main causes and specific methods of their formation.

A mole is a localized abnormality of skin pigmentation that can be present at birth or acquired later in life. A healthy person usually has 15 to 20 moles on their skin. Most of these moles are benign and do not require treatment. But some moles grow on the face and affect the appearance, and different methods can be used to remove them. The commonly used methods of mole removal are as follows: laser method, freezing method, electrocautery method, spot removal machine method and chemical agent method.

Black hairy nevus is a type of pigmented nevus. It often attracts special attention because of its local blackening, rough and raised skin, and hard short hairs. Moles occurring in parts of the body that are prone to friction or injury should be taken seriously. For example, if the mole grows rapidly, becomes lighter or darker in color, the short hair on the mole falls off, the area around the mole turns red, bloodshot can be seen, the surface has ulcers and scabs, or even ulcers that do not heal for a long time are formed. Swollen lymph nodes nearby, or the appearance of small satellite moles around the large mole, all indicate that the mole has a tendency to become malignant. You should go to the hospital to ask a dermatologist or surgeon for diagnosis so that timely treatment can be provided. For the treatment of black hairy nevus, small nevus with a diameter of less than 0.5 cm can be cauterized with laser or high-frequency electric knife. The advantages are simple operation, less damage to normal tissue, and small scars after healing; the disadvantages are that it is difficult to retain nevus tissue for pathological examination and it is not easy to remove it completely. There are also methods of mole removal such as freezing and chemical corrosion, but they are not suitable because of the side effects of incomplete removal and stimulation of malignant transformation of mole cells. The above shortcomings can be compensated by using trephine to remove the nevus. Use a piercing drill that is 0.2 cm larger than the diameter of the mole to drill the entire mole after local skin anesthesia. The incision only needs to be sutured with one stitch using very fine silk thread. Since the long axis of the incision is consistent with the skin lines or expression lines, the postoperative scar is not obvious and the cosmetic effect is better.

Most of the time, the formation of moles is mainly due to the pigmentation caused by the large accumulation of melanin in the human body. Sometimes it is also related to long-term exposure to ultraviolet rays. Some moles on the body can be effectively removed by the above methods. After removal, you should also do a good job of sun protection.