Dear Sam, Restylane® injections in the tear trough and undereye are very common. Although there are some very serious complications that can ensue, such as intra arterial injection, retinal embolization, blindness, skin sloughing and necrosis, these are exceedingly rare, especially in this era of small micro-cannula deployment. There is some possibility that injection of the extreme aspect of the medial canthus may have caused some subtle pressure above the bone and below the small structure that drains the inner aspect of the eye, called the canaliculus, and this pressure may result in a small and temporary impedance of flow of your tear film through the canaliculus, but in general, this should cause more tearing and epiphora than dry eye symptomatologies. I suspect that there are other causes for your dry eyes and it is not related to the Restylane® injection, but seeking the expert opinion of a functional ophthalmologist with experience treating dry eyes would be a very important aspect of your ongoing care if this were to persist. Prior to seeking the expertise of the ophthalmologist, you should seek the physician that injected the product under your eye. They may seek a referral for you or may prescribe the use of Natural Tears prior to a consultation. In general, if your results and aesthetic contours are excellent, it is likely that these dry symptomatologies are temporary and should resolve over the next few days. If this does not occur, definitely seek the opinion of your injection physician or expert and the advice of an ophthalmologist with dry eye syndrome expertise. I have been injecting soft tissue fillers, such as Restylane®, in the face for 20 years and the results are normally excellent and functional impairment very, very rare. For more information, please review the link below. I hope this information has been of some assistance and best of luck. Sincerely, R. Stephen Mulholland, M.D. Certified Plastic Surgeon Yorkville, Toronto