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:smile: In general, when you're messing about with the human body, and taking it to any limits or subjecting it to certain forms of "stimulation", you need to be aware of the limitations, the gradual progressive rates ect. Side effects, "break/healing/recovery periods" ect.
defiantly if she or you are in pain after a session,.. I would suggest waiting until youre healed up before going at it again. That's assuming you know exactly the cause and source of the pain specifically.
Just be safe and aware, and have fun but yes, she should get a doc to checkher out just to be safe
PS if youre too "embarassed" about talking about it here, there are pleanty of other forumsout there that deal with safe and fun ways of enjoying all sorts off fetishes