What is the best procedure for dark circles and hollow under the eyes?

As I get older, I've lost weight in my cheeks, causing the area under my eyes to sink deep and my dark circles to extend all the way down to my chin. ㅠㅠ It's stressful because I hear people ask three times a day if I look tired, even when I'm just sitting still. Concealer has its limits, so I'm looking into procedures that are good for sunken under-eyes. Would fillers be better, or would a collagen-replenishing booster like Juvelook be better? I've heard the skin under the eyes is thin and bruises easily, so I desperately need some real, firsthand reviews. ㅠㅠ Please, those of you who have brightened your under-eyes and found your light again, help me out! lol