Vaginal cysts are small fluid filled sacs that can develop in the vagina. They are caused by a number of things, and can often be treated relatively easily. Many cysts will even go away of their own accord. The cysts themselves are caused by a number of things. The most common cause is if the vagina has been cut in some way, sometimes during a biopsy
or medical examination, in your case the sex toy.Most vaginal cysts will cause no problems, and will just be left but checked regularly for changes. If the cyst is abnormally large, it may have to be surgically removed,If the cyst is causing abnormal pain see a gynec.