While I don't see a problem with getting microneedling 3.5 months after a rhinoplasty, I would consult with your surgeon that performed your rhinoplasty. The main concern would be placing too much pressure on the nose in certain areas. Microneedling can be a useful tool when looking to improve the appearance of scars.
You can get microneedling post rhinoplasty, there should be no reason you cannot. I suggest consulting an expert for treatment. Best, Dr. Emer
It is safe to perform microneedling on scars at 3.5 months post-op. This will encourge your scars to remodel and blend with the surrounding skin. Make sure the person performing the microneedling is gentle and does not apply to much pressure on the nose itself during the procedure. Hope this helps!