Headaches and Sinus Problems After Restylane Injections

It is difficult to imagine that the filler could have traveled somehow to block the sinuses. If venous drainage is compressed near the corner of the lip from veins that run up along the nose, then possibly there might be pressure in the upper head but it wouldn't be the sinuses. You could see an ENT physician (ear, nose and throat, an otorhinolaryngologist) who can do endoscopy of the sinuses and even order a scan for your sinuses to reassure you.

I don’t think the headaches and sinus problems are related to having Restylane injections in your lips.

I have been using Restylane since the day it was FDA approved in this country and have never come across a similar complaint. There is no anatomical way a small injection of Restylane in the upper lip may end up filling one, much less both, maxillary sinuses, without the injector's knowledge.

I think your best course of action is to have a MRI or CT of the head looking at your sinuses after seeing a ENT surgeon. He is best trained to advise you on your treatment.