What do you do for a bladder infection that keeps returning after treatment?

Further evaluation. If your UTI symptoms completely resolved on treatment and have returned, it is possible that you are now reinfected or were incompletely treated. Go back and get another urinalysis & culture. This should show the cause & the appropriate antibiotic. Further workup should reveal a cause for recurrent utis. If negative for infection, there could be other causes for your pelvic discomfort.