As a commonly used injectable filler material, hyaluronic acid is widely used for wrinkle removal and contouring, which is favored by many beauty lovers. Hyaluronic acid can be divided into large molecule hyaluronic acid, medium molecule hyaluronic acid and small molecule hyaluronic acid according to the size of the molecule, and different molecule sizes of hyaluronic acid have different roles. What is the difference between large molecule hyaluronic acid and small molecule hyaluronic acid? Large molecule hyaluronic acid has the role of filling and shaping, mainly used in breast augmentation and buttock augmentation, rhinoplasty and chin augmentation and other shaping surgery, the filler site is deep tissue. Large molecule hyaluronic acid can also be used to remove wrinkles, hyaluronic acid in the form of fillers injected into the dermal folds and depressions or want to moisturize the parts, such as lips, cheeks, chin and so on. The effect of using large molecule hyaluronic acid to remove wrinkles can be maintained for a longer period of time. Medium molecule hyaluronic acid is usually used to remove wrinkles, the injection site is usually for the tear trough, lips and wrinkles across the place, but also has the role of filling the depression, but like large molecule hyaluronic acid, medium molecule hyaluronic acid injection site is also the deep tissues, can’t fill the surface of the skin. Small molecule hyaluronic acid is a hyaluronic acid molecule like water, which is mainly used for dermal injection of the whole face, and can replenish the missing water of the dermis, as well as repair the damaged skin, and play a moisturizing and rejuvenating role, to make up for the lack of large molecule and medium molecule hyaluronic acid. Undeniably, there is a part of the people to do micropigmentation injection is very blind, do not know at all after the hyaluronic acid has a role, in fact, there are seven categories, a variety of models on the face of plastic surgery parts of the requirements of different, corresponding to different molecular sizes and maintenance of the time limit, as well as different indications, we must be very clear, the correct use. Different models of hyaluronic acid, the order used is different: hyaluronic acid injection should follow the principle of molecular hit first injection – first of all, the larger molecular hyaluronic acid should be injected in the deeper layers of the location (close to the periosteum), just like hitting the foundation, with a thicker and harder texture of the object to hold up the mechanism, and then fill in the small molecule of hyaluronic acid close to the surface of the dermis, producing a smooth surface. So, cosmetic injections with hyaluronic acid can also tighten the skin and return smoothness. As a final reminder, you should always choose a formal medical institution to receive treatment in order to achieve the safest and most desirable results.