Hello, it should be said that it is a borderline nevus, also called melanocyte nevus, or pigmented nevus for short. Brown or black macula, slightly raised, 2-8 mm round, clear boundary, uniform color, smooth and hairless surface, which can occur in any part, and most of them occur in palms and soles and external genitalia as borderline moles. Nevus cells and nevus cell nests are mainly located at the junction of epidermis and dermis of the skin, so they are named crossing nevus. The clinical manifestation is that the nevus is flat or slightly higher than the skin surface, the boundary is not clear, and the surface is smooth and hairless. Generally, it can be seen in any part of the body, but it usually occurs in the palm, toes or transitional epithelium. More common in children and young people, less common in adults. The nevus cells of borderline nevus have the characteristics of active proliferation and may be transformed into malignant melanoma.

Pigmented lesions with the following changes often suggest the possibility of early malignant melanoma: ① Color: Most malignant melanomas are mixed with brown, black, red, white or blue, and the color changes when encountering skin nevus, so we should be especially vigilant. ② Margins: It is often jagged and jagged, which is caused by tumor spreading around or spontaneous degeneration. ③ Surface: not smooth. Often rough with scaly or flaky desquamation. Sometimes there is oozing fluid or oozing blood, and the focus can be higher than the skin surface. ④ The skin around the lesion may appear edema or lose its original skin luster or turn white and gray. ⑤ Abnormal sensation: Itching, burning or tenderness often occur locally. When the above changes occur, it is strongly suggested that there is a suspicion of malignant melanoma. It can be said that once there is any change in skin nevus, it should be removed by biopsy to remove malignant melanoma.

You don't have to worry too much. After all, there are many people with moles. Try not to stimulate them at ordinary times, and pay attention to observe whether there are any adverse changes so as to seek medical treatment in time. Is "feeling a little painful recently" a psychological effect? Ha ha. .