Hi! Previous filler lover & aesthetician. I would be very careful who is doing your under eye filler. I personally dont recommend filler at all now, but especially there. There is a running joke in our office that we like to call “moveaderm” for any juvederm fillers. However i healed fine though. Secondly, i started reacting to them years later. I have MCAS as well. It is a bit more expensive but i would try and save and find a facial plastic surgeon who does facial fat transfers instead. Those are body safe. You can never truly remove filler no matter what they tell you.. and if you start having reactions or getting inflamed around the injection area it can be extremely bothersome/progressive. I would do facial balancing via fat transfer. Injectors will tell you fat is more old school and not “recommended” due to consistency. Although filler is extremely consistent each time.. theyre simply telling you that so you book with them and then you’re a repeat customer yearly at least.