How Long After Rhinoplasty Can I Have Alar Reduction?

Generally speaking, alar modification is performed at the time of the rhinoplasty. Since the alar tissues are modified externally, and this would not involve reopening or manipulating the rest of the nose, the honest answer is that it could be done at any time. The risk is that, with a lot of swelling in the nose so soon post-op, the alar reduction may be disproportional.  For that reason, I would wait 3 or 4 months. Best of luck!

Minimum 6 months, better if 1 year. You really need to wait for things to settle to see all the relationships. You also need to really be aware of the resulting scars that alar reduction produces. It is unlike rhinoplasty where the scars are hidden. These scars are placed in locations where they are less likely to show, but still are some what prominent. So if you are borderline and can possibly do without, then I would not recommend it.
Good luck.

 Though all the welling won't be gone, enough will be to make the determination as to whether or not alar resections would be indicated for you.