Eye bags are often found inadvertently when you look in the mirror one day. Many people in the consultation are not clear about the formation principle of eye bags, and simply think it is more fat bulging out. Under-eye bags are due to the aging, decline and relaxation of subcutaneous fibrous tissue, which makes the force of supporting orbital fat weak resulting in fat bulging outward. The tear trough is a half-moon shaped groove at the lower edge of the inner eye bag, which is more obvious when the light is on. This area is also the junction area of the lower lid and facial skin, where the thickness of the skin differs a lot. When you are young, the skin is tight, the collagen and subcutaneous fat of the eyelid and facial skin are richer, and the boundary between the two is not too obvious, but as the difference between the two becomes bigger and bigger with age, the boundary gradually becomes obvious and a clear groove is formed in the junction area. The appearance of the tear trough tends to make the bags under the eyes look more protruding. Some young people, however, mistakenly ask for eye bag removal simply because a tear trough appears and the lower eyelid above it looks raised. Likewise in some people who have already undergone surgery, they mistakenly believe that the surgeon did not remove the bags because the tear troughs did not improve, the root of these problems is not the bags themselves but to improve the tear troughs and to find a way to fill them in. The feeling of those bags under the eyes will be improved. In the past, few doctors would pay attention to this problem, after years of practice a new surgical method out gradually began to be paid attention to, when doing the bags under the eyes to move part of the fat of the bags to the tear trough to fill the depression, using this method patients after surgery not only the bags under the eyes are gone, but also improve the tear trough at the same time. Therefore, the best solution to fill the tear trough is to perform orbital fat release to fill the tear trough at the same time as the eye bag surgery. However, for some people who have not had enough fat to fill their tear troughs, or who have had most of their orbital fat removed after eye bag surgery, then the tear troughs cannot be improved, so tissue fillers can be used to solve this problem. We often encounter patients asking which is better: autologous fat or hyaluronic acid filler? Both are the simplest and most effective methods, and the one that is better depends on which one is more beneficial to the patient and involves different amounts of fillers needed for each person. Both hyaluronic acid and fat will be absorbed. It is more convenient to use hyaluronic acid which can be done anytime, however, hyaluronic acid will be completely absorbed, so it needs to be injected regularly and repeatedly, and the cost is slightly higher. With autologous fat, there will be absorption, but some of it will survive, and after a few fillings, long-lasting results can be achieved, and the cost is much cheaper compared to hyaluronic acid. Some patients also ask: Will the filled fat run away to other places? Generally, fat will not run away. The fat cells are very large and will not move after filling, and it is not likely that they can wander around like liquid.