I would not remove the stinger!! to remove it could potentially be fatal! remember the barbs of a stingray are not smooth, but a surated to inflict more damage if pulled. I have read females can/will sting a male if he is trying to mate and she is not willing. I am sure that it will work its way out, just do as every one else has said and make sure water is perfect in all ways, and maybe a little salt to help the healing along.