ive done a few cycles each time my shoulders have been used, no more than 1 injection a week however towards the end of a cycle it becomes a bit much and hurts, i had a few very painfull injections where they were getting over used i think and one time i believe i had some oil build up and a little bump, all gone now and feels fine my question is is it safe to inject delts again ?? ive had a fe massages done on the area too.