Adverse reactions of IUD have been talked about, but it must be said that more than 40% people in China are using IUD for contraception. Short-term wearing IUD has no side effects, but if you don't go to the hospital for a long time and wear it all the time, it may lead to uterine perforation and even through the bladder and intestinal wall near the uterus. Although IUD is economical and long-lasting, we should also pay attention to its adverse reactions. It is worth noting that not every woman is suitable for wearing IUD. Some women don't feel the pain of wearing IUD, while others feel very uncomfortable. It is best to avoid overwork and heavy work in the first two weeks with IUD. Contraceptive rings may not be suitable for everyone. You need to go to the hospital for a physical examination before wearing it. You need to have a qualified physical fitness and no adverse reactions, so that the doctor can place an IUD for you. The average woman will feel a little pain in her abdomen after wearing an intrauterine device. IUD takes about two to three weeks to adapt. Tumor women, such as patients with uterine fibroids and ovarian tumors, must refuse to go to the contraceptive ring. Women with gynecological inflammation such as trichomonal vaginitis and fungal vaginitis, patients with severe cervical erosion, and patients with acute and chronic pelvic inflammatory disease. Women whose uterine cavity is more than 9cm or less than 5.5cm cannot be put on the ring. Women with menorrhagia or uncleanness, in this case, need to relieve the bad symptoms of menstruation before they can get on the ring. Wearing a ring may lead to excessive menstrual blood, which is also one of the side effects of wearing a ring, because some intrauterine device ring materials contain copper ions, which have cytotoxicity and hemolysis, which will lead to increased menstrual blood and non-coagulation of blood flow. Band ring may cause endometrial fibrosis. When foreign bodies appear in human body, it will lead to local tissue mechanical damage, chronic inflammation and fibrosis. When wearing a ring, the contraceptive ring should be placed in the body. Contraceptive rings are also foreign bodies, so band rings may also cause endometrial fibrosis. Endometrial fibrosis usually occurs 10 ~ 12 after removal of the ring.