Injection cosmetology is a kind of non-surgical plastic surgery, which uses injection method to inject biomaterials or synthetic biocompatible materials into dermis or subcutaneous, and achieves skin wrinkles or shaping through different mechanisms. Wrinkles: Age, smoking, and the traction of squeezing gravity during sleep will all cause the reduction of collagen and elastic fibers in the dermis, which will relax the skin and cause facial wrinkles.

Lip type: the lips will shrink and wrinkle with age, and the corners of the mouth will droop with age.

Face shape: aging will change the distribution of subcutaneous tissue, with drooping temples, cheeks, eyes and lips, and redundant drooping of eye bags on both sides of chin and nasolabial groove.

Dent of muscle movement: One third of wrinkles on the face often come from muscle movement, but it will cause deep static dents over time.

Volume modification: the height of nose, the shape of nostril, the size of earlobe, the shape of lips, etc. It can be adjusted from person to person, and the congenital face contour can also be changed by filling.

Filling the defect: the asymmetry of the congenital defect of the unwanted scar in acne scar pit trauma surgery can be reconstructed by filling. Generally speaking, I will be divided into filling type and nerve blocking filling type, and generally divided into animal-derived component materials and non-animal filling materials. The general injection method is multi-point method or retrograde method, and it is usually injected into dermis or muscle layer.