IUD stomach pain is normal, because the IUD in the uterus belongs to a foreign body, easy to stimulate the uterus to cause uterine contractions, it will lead to abdominal pain. It is easy to cause damage to the uterine lining when the IUD is in place, which can also lead to a certain amount of pain. If the pain is caused by the ring stimulation, usually lasts 3-5 days, if the abdominal pain is longer, it may be caused by inflammation stimulation, because the uterus will be damaged during the IUD. If you do not pay attention to hygiene will cause intrauterine infection, such as causing endometritis, pelvic inflammatory disease, etc., will cause abdominal pain, lumbar pain, lumbago and other discomforts, but also cause an increase in vaginal secretions, put the ring after the tummy ache need to go to the hospital ultrasound, but also need to carry out a routine examination of the leukorrhea, if gynecological inflammation caused by the need to reasonably take metronidazole, but also can take amoxicillin clavulanic acid potassium treatment.