The side effects of IUD are: irregular vaginal bleeding, lower back pain, lower abdominal cramping, menstrual disorders, and pregnancy with the device. Irregular vaginal bleeding may occur after the IUD is first applied or when the IUD has moved down; if a woman with the IUD is overworked or during her menstrual period, she may experience lower back pain and lower abdominal cramping. The IUD is placed in the uterine cavity, which may affect the cyclical shedding of the endometrium and cause menstrual disorders. The success rate of contraception with the IUD is over 98%, but there are cases of pregnancy with the IUD. If a woman is not comfortable with the ring, she can be treated under the guidance of a doctor. If the treatment does not improve after 3 months, you can consider using condoms for contraception.