You should be sure to keep your check-up appointments and clean the pessary as your doctor tells you. You may notice more vaginal discharge than normal. Your vaginal discharge may also develop an odor. Certain vaginal gels can help with these side effects. Your doctor may or may not have you douche as well.
Vaginal irritation is another possible side effect.
Women who are past menopause may need to use estrogen cream for the irritation. The vagina is a closed tube. The pessary can't go anywhere else inside the body. The pessary can fall out of the vagina if you strain or lift something. This usually means that your pessary is too small.