Mole is a very common disease, which can be easily seen by both white and yellow people. Clinically, it can be divided into five types: 1. 2. The flat middle bulges, while the flat sides. 3. Mastoid surface. 4. Dome surface. 5. Styloid process shape. The first three will be black, and the last two may not be! Therefore, seeing that you have black protrusions on your body does not rule out the possibility of moles! Basically, if mom and dad have a lot of moles, then their sons and daughters probably can't escape! And said, "this is a must!" However, many people find that moles will increase after long exposure, or during adolescence and pregnancy, so in fact, most people have many moles. At first, they are very small and invisible, but with the arrival of sunshine and adolescence, they will emerge like mushrooms after rain! As for diet or other daily life, it has nothing to do with this. This "long" mole usually only appears before the age of 30, and most smaller moles will gradually disappear with age! Why do moles grow up? Why is it convex? Why did it disappear? Some even have long hair! This is actually related to the growth and changes of nevus cells. At first, nevus cells appear in the basal cell layer of epidermis, just like a small tree grows into a big tree, nevus cells will also increase, gather together, and slowly grow down, accumulating more and more in the dermis, which may push the epidermis up, so the nevus will bulge! However, compared with malignant tumors, these nevus cells are quite quiet, they will not run around without leaving the team, they will not eat innocent tissue cells next to them, and they will even gradually age and die like ordinary cells, so there is no need to worry about long-haired nevus! Of course, it is difficult for the general public to tell whether these little things are benign moles or malignant tumors, because many skin tumors can sometimes look like! Therefore, if you see uneven sides, irregular edges, uneven colors, more than one centimeter in diameter, uneven surface, or frequent itching, or even ulcers in the middle, or grow out when you are old, which will obviously become larger within one year, you should find a dermatologist to diagnose it, so as not to be misdiagnosed as a malignant tumor! If it's just a benign mole, the only worry is that it's not good-looking. If you want to get rid of it quickly, it is still aging. Please see a dermatologist. Because if it is a malignant tumor, the treatment method is different! For moles without protrusions, carbon dioxide laser can be used to remove them, which may take one or two times according to the depth. However, if it is a protruding mole, because it is deep, only surgical resection will have little effect on the postoperative appearance. Generally speaking, these operations are very safe as long as they are not allergic to anesthetics.