Pointed nevus (usually refers to pigmented nevus) within half a year and grow to 3 mm is a certain danger, it is recommended to go to the hospital in time to do a checkup, alert to the phenomenon of malignant changes. Pigmented nevus is a benign tumor caused by melanocyte proliferation, if removed by laser, drug corrosion or liquid nitrogen freezing, there may still be a small amount of melanocyte retention, and not removed cleanly, in this case will cause pigmented nevus point after the phenomenon of growth. After the pigmented nevus is removed by laser, drug corrosion or liquid nitrogen freezing, the phenomenon of growing up again may exist, but it is necessary to pay attention to the speed of growth and changes in the shape of the nevus, if the growth speed is too fast and the shape is asymmetrical, it is necessary to raise vigilance, and it is recommended that you can go to the hospital to have a checkup. After the removal of nevus, we should pay attention to the postnatal care work, avoid the wound infection, avoid the sun, and take precautionary measures.