Can hard coughing cause post rhinoplasty problems?

Possibly: If you need to cough or sneeze do it with your mouth open to direct the pressure out of your mouth instead of your recently operated nasal passages.

Yes: Anything that causes increased pressure or exertion may result in bleeding or more swelling in are of surgery. Usually does not cause any long-term problem with the rhinoplasty as long as the swelling is resolved fairly quicky. Nasal bleeding tendancy is for about 7-14 days post surgery.

Possibly: It may cause bleeding or disruption if the nasal bone reduction.

Unlikely: Could increase oozing or swelling.

Yes: It can cause bleeding.