What Causes Acne After Septoplasty?

I had septoplasty/turbinectomy about 4 months ago. No other surgeries involved. About a week after surgery I started breaking out- all over my entire face. Prior to surgery, I had hormonal breakouts but nothing severe. Now, The breakouts are constant, and hard to get rid of. The pores on my nose are extremely large and I have tons of blackheads. I've tried everything under the sun to control this to no avail. What could have caused this?