Hi, Thanks for using HCM.
IUD can cause intrauterine infection, get examined by your gynecologist for any foul smelling discharge.
risk of infection is more due change in PH level of vagina.
You may need antibiotic treatment. if you have intrauterine infection, need to remove IUD.
Hope I answered your question. Consult your doctor for further examination and management.
Feel free to ask me if you have any further queries.
Wish you good health. Take care.