The manifestations of large and small faces are: bilateral zygomatic asymmetry, bilateral mandibular asymmetry, and left and right asymmetry with the facial midline as the boundary. The asymmetry of cheekbones is characterized by different heights of the left and right cheekbones and different areas of the left and right cheekbones. The asymmetry of mandible shows that the opening degree of left and right dental arches is different, the size and area of left and right mandibular bodies are different, the size of left and right mandibular angles is different, and the size of left and right mandibular margins is different. Some phenomena of large and small faces can be corrected or improved by surgery, such as different cheekbones, different sizes of left and right mandibles, different sizes of mandibular angles, different sizes of mandibular margins and different sizes of left and right chins. Some of them are difficult or impossible to be corrected by surgery because of the limitations of basic conditions, such as different sizes of the left and right cheekbones, different sizes of the left and right zygomatic arches, and different degrees of opening of the left and right dental arches. To ask how to improve the face size, plastic surgery hospital experts said that the first thing to understand is the different reasons. If the masseter muscles are different in size, a part needs to be removed. The masseter muscle is not as big as the left and right, which is easy to cause the problem of big face and small face. We can solve it by correcting masseter hypertrophy. One side of the masseter muscle is not big. To solve this problem, it is necessary to design the whole face before operation and improve the masseter muscle comprehensively, integrally and thoroughly, so as to greatly improve the success rate, satisfaction rate and postoperative effect of the operation. At the same time, there are three kinds of surgical incisions: intraoral incision, extraoral incision and combined incision. At present, oral incision is often used. The operation is more complicated than the extraoral incision, and the recovery is slightly slower, but it will not leave a wound on the cheek. So, what to do with big and small faces, now don't worry at all. But it should be noted that not all people can be treated by surgery, and it also has its own contraindications. Usually, the following people are not suitable for this operation: First, the mandibular angle is too small, showing a Chinese face. Second, the valgus of the mandible thickens, making the face trapezoidal, which does not meet the aesthetic standards and lacks a soft and smooth outline. Experts from Shenyang 202 Hospital gave a detailed introduction. If you are troubled by this problem, you must treat it in time. Don't delay time, so as not to lead to further deterioration of the problem; Don't blindly use drugs, or go to a regular hospital for treatment, so as to ensure the therapeutic effect and protect your health. (Editor: Huang Shuqiong)