Sex reassignment surgery is medically known as gender reset surgery and is categorized as male-to-female, female-to-male and intersex gender affirmation. Because of the differences in medical development and surgical difficulty, the gender reassignment surgery that people talk about generally refers to male-to-female surgery. The main part of male-to-female gender reassignment surgery is the removal and molding of external reproductive organs, including the removal of male reproductive organs such as the penis and testicles, and then the male lower body becomes basically similar to the female lower body through urethroplasty, labiaplasty, vaginal reconstruction and other surgeries. Other complementary surgeries are laryngoplasty, breast augmentation, facial softening, and beard follicle removal. The body of the surgical subject is finally made to conform to the self-gender identity. However, the internal reproductive organs are still different; there is no uterus or ovaries in the lower abdomen, no menstrual cycle and no ability to conceive children. After gender reassignment surgery, the patient is required to take estrogen for a long period of time to suppress the production of androgens. At first, the change in body structure is too great, resulting in discomfort. However, after a period of adaptation, the discomfort will disappear. It is recommended to go to a regular hospital to have the surgery performed by a professional doctor and follow the doctor’s instructions for recovery after the surgery.