After the age of 40, as the skin of the lower eyelid, orbicularis muscle, orbital fascia and orbital fat all undergo degenerative changes, resulting in skin laxity, wrinkles, sagging of the orbicularis muscle and orbital septum, and herniation of the inner fat mass, forming bags on the lower eyelid, i.e. aging bags. How many times in a lifetime can I have eye bag surgery? In general, a person can have 2~4 times of eye bag surgery in a lifetime, depending on the specific situation, too many surgeries are not recommended. This is because repeatedly doing the surgery several times will easily cause adhesions to the subcutaneous tissue and form scarring, which will affect both the aesthetics and the normal function. It is better to have one surgery at the early detection, because the earlier the surgery is done the better its recovery effect and the more natural the post-operative appearance is. However, if the lifestyle is still irregular, the residual fat may still bulge or herniate out years later, along with the sagging skin of the lower eyelid, forming bags under the eyes again. In this case, it can still be removed surgically again. How long can double eyelid surgery last? How long the eyelid shape lasts after eyelid surgery depends on the surgical procedure chosen and the degree of laxity of the skin over time. The surgical methods used to form double eyelids are the buried liner method, the Korean three-point minimally invasive method, and the incisional blepharoplasty method. Of these, the buried eyelid method has the shortest duration and has the potential to become shallow and disappear over time. The Korean three-dot minimally invasive method and the incisional blepharoplasty method have longer lasting eyelids. However, this longevity is relative. As we age, the aging and laxity of the skin increases, which can lead to sagging of the upper eyelid skin, causing the double eyelids to be covered up and disappear.