Can a 16 year old get cosmetic surgery?

The answer is: it depends

In general, most cosmetic surgeons will not perform surgery on a minor without the consent of a parent or guardian. However, there are some exceptions to this rule. For example, in some states, a minor may be able to get cosmetic surgery if they are emancipated or if they have a medical condition that requires surgery. Additionally, some surgeons may be willing to perform cosmetic surgery on a minor if they are accompanied by a parent or guardian and if the minor is fully informed about the risks and benefits of the procedure.