What kind of pigmented moles are prone to malignant change 1. congenital giant moles are most prone to malignant change 2. congenital small moles 3. moles on the soles of the feet, toes, palms, fingers, under the nails and perineum These should be removed early or closely observed and removed in time when there are changes. The signs of malignant pigmented moles: 1. asymmetry, the shape of two sides of a mole are different; 2. irregular edge; 3. uneven color, the color of the same mole varies; 4. diameter exceeds the size of a pencil head (>6mm); 5. elevation, that is, a part of the mole rises high. In these cases, the nevus should be removed early for pathological examination. If a pigmented nevus suddenly becomes inflamed, ulcerated, bleeding or satellite nevus appears next to the nevus, the possibility of malignant change should be considered and should be examined and treated by a specialist as soon as possible. Small pigmented nevus can be directly excised and sutured. Generally, pigmented nevus not in special parts (eyes, ears, mouth, nose, etc.) with diameter less than 4cm can be directly sutured. Pigmented nevus that is slightly larger in eyes, ears, mouth, nose or with diameter greater than 4cm may not only be excised and directly sutured, but also require flap transfer surgery to close the wound and protect the special parts from deformation. After excision surgery, the stitches should be removed in 7 days for the face, 10 days for the torso, and 14 days for the joints, as informed by the surgeon. The facial wound is recommended not to wrap the gauze on the second day, all open, especially the nose surgery, the wound pay attention to clean and dry. 2. In the short term after stitch removal, usually around 3 months, the wound will become more and more red and hard, and then slowly improve, and the scar will reach stability after one year, and scar removal drugs can be used within one year. For facial scar, the scar is not easy to proliferate in general people after time, back of neck, front chest, outer upper arm, auricular scar is more obvious compared to facial scar. For keloid people, these areas are also more prone to hyperplastic keloid scars, and some people are even prone to keloid scars. (PS: Please don’t think that people with keloid scars are keloid, unless they are immortal, everyone has keloid scars, people with keloid scars have unbearable keloid scars, please consult your doctor if you have keloid scars)