Stem cell therapy is to activate the body’s own “self-healing function” through infusion of specific cells, including various stem cells and immune cells, to supplement and regulate diseased cells, activate cell function, increase the number of normal cells, improve cell activity, improve cell quality, delay and prevent cellular lesions, and restore normal cellular The aim is to promote the recovery of diseases. The stem cell therapy currently promoted by beauty institutions is usually autologous fat stem cells, hair follicle stem cells or stem cell cultures for facial anti-aging and skin rejuvenation. In terms of aesthetics, stem cell therapy is still in the laboratory stage. And in terms of clinical application, stem cell therapy still has unpredictable risks. In addition, there are many technical difficulties in the actual treatment of stem cell therapy, such as allograft rejection and other side effects. The effect of stem cell therapy is different for different diseases and the side effects are not the same, and the statement that it is completely free of side effects can not be believed. Clinical trials have reported that embryonic stem cells can cause tumors to a certain extent. Mesenchymal stem cells, on the other hand, are currently recognized as the safest type of cells, with no reports of tumorigenicity or rejection, and occasional fever and mild headache, making them more popular among clinical researchers.