Thin double chin, one is to suck out or dissolve fat, and the other is to lift local skin, which are all useful. Face-lifting is generally divided into three situations. In the first case, there is a lot of fat. Generally speaking, the common position is on that cheek and cheek. The detection method is to do a sucking action to see if it can look good. The location of the depression, which is full of fat, can be surgically removed; The other is subcutaneous fat, which can be made of optical fiber thermoplastic. This is the reason for being fat. The second biggest problem is muscle hypertrophy, which is also commonly known as masticatory muscle hypertrophy. I also support it, because our chewing function includes a group of other muscles besides our masseter muscle, such as the powerful temporal muscle and medial pterygoid muscle, so it is unlikely to have a serious impact on people's chewing. This method is to inject botulinum toxin, and the effect will last for half a year in two weeks. The third situation, that is, the bone, mandibular angle hypertrophy. Generally, surgery can be performed to remove the mandibular angle. There are two ways to grind bone: oral and extraoral. There is no scar outside the oral treatment, but it is more or less risky. Extraoral surgery is very safe, but there is a small incision behind it, which should be chosen according to the situation. Face is not terrible, we should distinguish the reasons and deal with them according to each situation. I hope this answer can help you.