After IUD insertion, bleeding during sex and low back pain is a concern?

Question
I am 29 years old, have had 2 children (naturally born), I am currently using an IUD for 10 months. I sometimes have brown discharge that lasts about 2 days after sex, this is not very common. When having strong intercourse, there is often pain in the lower left abdomen, colposcopy and ultrasound at a private clinic several times, but nothing was found. Irregular menstruation, each period lasts from 5-7 days, the amount of blood is small, I have never had dysmenorrhea. Recently, I often have low back pain, sometimes it hurts to stand up and walk. The current month I have menorrhagia, about 1 week first, only red brown discharge, then thick and dark blood lasts 13 days but not over yet, the amount of bleeding is not much. Doctor let me ask if this phenomenon of mine is worrisome?
P.Y (Hanoi)
Reply
Hi, IUD or IUD is a highly effective and long-acting contraceptive method that can be used widely. The effectiveness of preventing pregnancy is 95-97%. This is a suitable contraceptive method for women who have had one child or have had enough of the desired number of children. However, IUD insertion can have some side effects and complications such as: spotting bleeding, heavy menstrual bleeding, bleeding between periods, intrauterine displacement, intrauterine fixation endometrium and perforation of the uterus.
The most serious complication is an IUD that can lead to pelvic inflammatory disease, which is slow-growing at first and can progress to endometritis, myositis, and sometimes ovary-tubal abscess. . This disease manifests as premenstrual syndrome (edema, spotting), foul-smelling discharge, chills, loss of appetite, severe pain in the lower abdomen or infertility. You should go to a medical facility to check the status of the ring and detect early complications for timely treatment.
Doctor Lai Thi Nguyet Hang - Department of Obstetrics and Gynecology - Vinmec Ha Long International Hospital