Normally, if a person experiences a large amount of skin dehydration within a short period of time, it can lead to the appearance of sagging skin in the facial area. It can also be related to a wasting disease such as malnutrition, which can cause sagging changes in the facial skin or even in the skin around the body. Another possibility is that as we grow older, the overall collagen and fat distribution pattern of the facial area will change and the fat and collagen in the facial area will gradually decrease, which will also lead to facial sagging. This situation is not necessarily a lack of anything, the improvement method is to enhance nutrition. If the subcutaneous fat or collagen is reduced, it can also be improved by means of cosmetic injections, etc.