The subcutaneous implantation method is a new type of drug contraceptive method. The principle and precautions are as follows: 1. It is suitable for women under 40 years old who need long-term contraception, and the duration of action can be about 6 years; 2. A certain dose of progestin is placed in a silicon capsule tube and buried under the skin so that a small amount of progestin is released slowly to change the consistency of cervical mucus and inhibit the growth of endometrium, so that sperm cannot enter the uterine cavity smoothly, thus 3.Severe anemia, hypertension, frequent headache, hyperthyroidism, diabetes, uterine fibroids, hepatitis, nephritis, history of ectopic pregnancy and lactating women are not suitable for this contraceptive method; 4.Since subcutaneous implantation method is to change the hormone level in human body to achieve the purpose of contraception, some people may have irregular menstruation, irregular menstruation, irregular menstruation, irregular menstruation and irregular menstruation after implantation. After implantation, some people may have symptoms such as irregular menstruation, dripping menstruation, prolonged menstruation or no menstruation, and some people may have adverse reactions such as headache, emotional sensitivity, acne and weight gain. After the dermaplaning procedure, it is important to review the procedure on time. If any discomfort is detected, the dermaplaning will need to be removed. In addition, if there is bleeding from the wound, infection or prolapse of the silicone capsule tube, you should seek immediate medical attention. If amenorrhea, irregular vaginal bleeding and lower abdominal pain occur, you should go to the hospital immediately or use early pregnancy test and other means to exclude the possibility of pregnancy.