As anyone knows, cosmetic surgery is a risky medical procedure. It must be guided by scientific and technological medicine to achieve reasonable results. Thus, the latest technological products are constantly used in modern cosmetology, and hyaluronic acid is one of the new products that are widely used. It is a hyaluronic acid, also known as glycolic acid. Natural hyaluronic acid is a high molecular polysaccharide, a straight-chain polysaccharide composed of glucuronic acid-N-glucosamine acetate as a disaccharide molecular unit, with an average molecular weight between 100,000 and 10 million Dalton, which exists in the intercellular matrix. Hyaluronic acid is a non-animal stable hyaluronic acid cultivated by bacterial fermentation. Hyaluronic acid is injected in the form of filler into the wrinkles and depressions of the dermis, or into the parts that wish to be plumped up, to achieve the effect of wrinkle removal and face modification, which can immediately remove wrinkles and change the appearance. Hyaluronic acid, which exists in the dermis of human skin in gel form, is responsible for storing water and increasing the volume of the skin, making the skin look full, plump and elastic. However, hyaluronic acid disappears with age, causing the skin to lose its ability to store water, gradually becoming dull, aging, and forming small wrinkles. Thanks to the advancement of biotechnology, hyaluronic acid can be extracted from the connective tissues of vertebrate animals, such as corns, eyeballs, umbilical cords, cartilage, and other parts. In the past, the source of hyaluronic acid was mostly extracted from animals, but now it is synthesized artificially, eliminating problems such as allergies and infections. Therefore, hyaluronic acid is a boon to women who are keen on beauty to retain their youth. Hyaluronic acid is becoming more and more important and popular in modern cosmetic procedures. Hyaluronic acid has become the most important product in cosmetic medicine, and it can be said that it is involved in all aspects of beauty, such as wrinkle removal, due to age, smoking, squeezing during sleep and the traction of gravity, will cause the collagen and elastic fibers of the dermis to decrease, causing skin relaxation, resulting in facial wrinkles, and hyaluronic acid injections can effectively solve a variety of wrinkles. In terms of lip augmentation, hyaluronic acid filler lip augmentation has received more favorable comments than other beauty products. The face is the focus of beauty, and human aging will cause changes in the distribution of subcutaneous tissues, temporal, cheeks, orbits and around the lips will be sunken, and there will also be lines. The effect of hyaluronic acid for facial fillers including lines is particularly satisfying and there are no side effects. Some acne scars, scars caused by trauma, surgery and some congenital scars can be repaired without traces by hyaluronic acid. The appearance of hyaluronic acid has set off a new revolution in rhinoplasty. Since hyaluronic acid injection is used for rhinoplasty, the advantages of fast rhinoplasty, no incision, and no pain make rhinoplasty such as prosthetic rhinoplasty a challenge, and it can be said that in a few years, no one will choose to use prosthesis for rhinoplasty. As for chin augmentation, hyaluronic acid chin augmentation is less traumatic and quicker to recover, which can effectively trim the shape of the chin and has a very obvious effect on the face shape. It also has the advantages of no recovery period and 24-hour shaping.