Acne vulgaris is a chronic inflammatory skin disease that involves the sebaceous glands of hair follicles. It starts as small pimples or red papules, and then develops into small pustules or nodules. In severe cases, abscesses and cysts may form, accompanied by pain, and finally uneven scars like the surface of the moon, which seriously affect your face. There are many ways to treat acne, but many people think that they can just use some acne products topically, but this is not only ineffective in removing acne, but may also leave scars and pigmentation. Depending on the severity of acne, different treatments are needed to achieve the desired results. For lighter acne and pimples, the use of medication can be effectively treated, while for heavier pimples and pustules, red and blue light treatment can also be used. Red and blue light has now become an important means of clinical treatment for acne, with significant efficacy and safe application. The propagation of Propionibacterium acnes leads to the formation of acne. Blue light with a wavelength of 415nm has the effect of rapid sterilization. While red light promotes fibroblast growth and collagen synthesis in cells, accelerating the regeneration of new skin tissue and reducing the formation of acne scars. The combination of blue light and red light for acne is a new treatment method that can well clear inflammatory and cystic acne, while having the effect of promoting collagen growth and enhancing skin quality. Acne treatment measures without any side effects have become a new weapon in the battle against acne. The most serious and difficult to treat acne, the formation of nodules, cysts, and even scarring, occurs mostly among young men, causing severe psychological stress and even leading to social disorders. For this type of acne, oral treatment with retinoids is available, but some people cannot tolerate them due to side effects such as teratogenicity. ALA photodynamic therapy is a new technology for the treatment of moderate to severe acne that is highly effective, fast, safe, and well tolerated. Photodynamic therapy is a new treatment technology that selectively destroys lesions through photodynamic reactions by combining the application of photosensitizers and corresponding light sources. It can directly kill Propionibacterium acnes, inhibit sebum secretion, improve hyperkeratinization of keratin-forming cells at the mouth of the hair follicle, promote healing of skin lesions, and prevent or reduce scar formation, thus inhibiting the occurrence and development of acne from all aspects of acne pathogenesis and producing good results. It can be used especially for acne patients for whom traditional treatments are ineffective, who are not suitable for other treatments or who cannot tolerate other treatments, and is especially suitable for moderate to severe acne. For the depressed scars produced by nodular cystic acne after healing, traditional medication is ineffective. The advanced plasma plasma beam cosmetic instrument introduced by our department can significantly improve the uniformity, flatness and color difference of the scar, effectively remove the scar, promote the proliferation and rearrangement of the deep collagen layer, improve skin quality, return your radiant and flawless skin, and enhance your facial value.