Why do I get these bulges under my eyes when I smile?

I WOULD TRY FILLERS BEFORE GOING IN AND DOING SURGERY , THE DIFFERENCE BETWEEN FAT TRANSFER AND FILLERS ARE FILLER ARE LESS INVASIVE AND CAN LAST 6-9 MONTHS SOMETIMES UP TO A YEAR DEPENDING ON WHICH ONES. FAT TRANSFERS ARE USUALLY SURGICALLY DONE WITH LIPO AND TRANSFERRED TO ANOTHER AREA OF THE BODY. A FAT TRANSFER CAN ALSO BE DONE THROUGH A LOCAL AFTER SURGERY FOR A REPEAT FAT INJECTION. FAT INJECTIONS OR TRANSFERS ARE USUALLY MORE PERMANENT. THIS IS SOMETHING THAT YOU MAY WANT TO SPEAK TO YOUR DOCTOR ABOUT IN A CONSULTATION AND SEE WHAT YOUR OPTIONS ARE.

The bulge under eyes is likely combination of orbitat fat (bags) and skin, which can be improved with transconjunctival lower blepharoplasty +/- skin pinch. See link below.