Under eye twitching around 3 week after Restylane filler to tear trough. Is this normal?

It is normal to experience some asymmetry when healing from injections. Swelling and bruising can last approx. 2 weeks. Sleep with your head slightly elevated and apply ice packs for 10 mins several times a day to reduce swelling. Use your best judgement, if the area is getting worse...

Swelling is a common side effect from nasolabial fold injections. Swelling peaks at 24-48 hours. Sleep with your head slightly elevated to reduce swelling. Best of Luck. 

Restylane is a great treatment for the area under the eyes.  I do not believe that the sinus infection has anything to do with the Restylane injections.  Please consult an ENT to be examined for your sinusitis.

The migration of Restylane from the lower eyelids to the upper eyelids sounds physiologically impossible.  Please consult a board certified dermatologist for examination and possible biopsy of the area.  Please let us know what happens.

Nothing to worry about if it is just bruising and swelling. This is very very common because the skin around the eyes is very thin and has many blood vessels, leading to (sometimes significant) bruising and swelling. It sounds like you are doing all of the right things--cold compresses & Arnica....

Restylane is an excellent filler for the tear troughs and cheek area.  I am not certain why you were massaging the area of injection.  If you are experiencing vision problems you should immediately return to your treating physician for examination.  Please let us know your outcome.