The body produces extra blood and fluids during pregnancy, which can result in swelling, even in unexpected locations like the nasal passages, and even thickening of the nasal walls. In certain women, the nasal passages and sinus cavities become more congested and produce more mucus. The good news is that the results of your rhinoplasty are designed to last both during and after pregnancy. Although the interior of the nose may start to expand and the appearance of the nose may be puffy or swollen as a result, all of these symptoms are normal pregnancy side effects that will go away after delivery. Always seek medical attention as soon as you can if the swelling starts to make it difficult for you to breathe.