The human body is not made up of one type of cell, but of many types of cells. Different cells perform different functions, but all of these cells develop from a fertilized egg. During the development of the fertilized egg, not only does the number of cells expand by dividing, but also the variety of cells increases by differentiation. Stem cells are those cells that are undifferentiated and have the potential to differentiate into different types of cells. However, if stem cells are to be successfully used for therapeutic purposes, there are still many problems to be solved, such as the suppression of immune rejection and the induction of their targeted differentiation into the desired cells. There is no stem cell therapy that has been approved by the Food and Drug Administration worldwide. And before a therapy can be applied to the clinic, animal experiments and then human clinical trials are required. From this, it is certain that stem cell treatment for under-eye bags has not been tested on animals and human clinical trials at all, and is directly used for clinical treatment with the purpose of making profit. Judging from the side effect symptoms of some consumers after surgery, the real composition of some stem cells used for surgical injection may be some kind of hormones or other substances of unknown composition, which may show local allergy after injection, and may also lead to local skin necrosis if injected into the blood vessels, etc. Therefore, it is recommended that consumers should not go to irregular beauty institutions and blindly choose certain immature beauty techniques.