  How young is too young for cosmetic surgery? Of course we don't do facelifts on teenagers, but we do perform lots of cosmetic surgery on them. In fact, 00,000 kids - 00 years old and under - went under the knife last year, according to the American Society for Aesthetic Plastic Surgery. Most of them had their noses reshaped and their ears setback, but 0,000 had their breasts made smaller and 0,000 had their breasts made larger.  How young is too young for cosmetic surgery? Of course we don't do facelifts on teenagers, but we do perform lots of cosmetic surgery on them. In fact, 00,000 kids - 00 years old and under - went under the knife last year, according to the American Society for Aesthetic Plastic Surgery. Most of them had their noses reshaped and their ears setback, but 0,000 had their breasts made smaller and 0,000 had their breasts made larger.  