HI SC. Although swelling is very common, significant pain after under eye injections is a bit out of the ordinary. We tell our patients to expect to be sensitive in this area, as with most injections, but unusual pain, especially without pressing on the area would be unusual for us. If you have this type of pain, we would recommend you contact your injector. As for the bruise, one options is a laser treatment. We commonly treat injection bruising with pulsed dye or long pulsed yag lasers to get rid of the bruises. Sometimes we can reduce the bruising time from 7-10 days down to just 1 or 2 with the laser treatments. For examples of Los Angeles and Orange County before and after photos for under eye injection procedures, you can visit the link below.