1, freckles. Small brown spots from the tip of a needle to the size of a grain of rice, walking on cheeks and nose. Usually in childhood, all the time. 2. Hey. Most of them gradually appear after puberty, ranging from a few to dozens, with flat brown or black spots or protruding papules, mainly distributed in the face and neck. 3, cheekbones. After puberty, it gradually appears, located under the bilateral cheekbones or the lateral sides of the eyes, with gray-blue needle tips to cluster spots the size of rice grains, and a few people have family inheritance. 4, liver spots. After the age of 25, the brown spots gradually increase, which appear symmetrically on both cheeks. The color is similar to that of cooked pig liver, so it is called liver spot, which has nothing to do with liver disease. 5, sunburn. Oval convex or smooth. Dark brown plaque, easy to appear on the outside of forearm, back of hand, front of calf and face. About the size of a grain of rice to a dime, middle age began to appear. 6, light coffee spots. There are usually irregular light brown patches at birth. Finally, Wuxi Plastic Surgery Hospital.