How to fix breathing problems after bad rhinoplasty?

I am sorry to hear that you are having breathing problems. Your nose produces several liters of mucous to help keep the air moist. If you have normal breathing through your nose, mucous evaporates and there is not as much to drain back. If you have an altered anatomy with a narrow passageway, there is an insufficient airflow in your nose to match the mucous production which is usually constant. As a result, you may be feeling more mucous draining back. In order to fix that, you may need to widen your nasal passages. This is usually performed with placement of spreader grafts to increase airway and batan grafts to help reduce collapse.