When is the latest i can have steriod injections after rhinoplasty?

Hello i had a rhinoplasty nearly 5 months ago and i gained a 'pollybreak' my surgeon said he doesnt want to do the steriods just yet because i have a few pimples on my nose, i have an appointment with him in 2 months which will make me 7 months post op, he said he will then do the steriod injections. Is this too late? Is there a deadline for the injections? Also will they 100% bring the swelling down?