Acne, also known as pimples, acne, and pimples, is a common dermatological disorder among adolescent men and women that affects people greatly. How can facial acne be treated? During puberty, hormones in the human body stimulate hair growth and promote sebaceous glands to secrete more oil. Hair and sebaceous glands accumulate many substances that attract oil and bacteria, triggering skin redness and swelling, resulting in acne on the face. Many people who have passed puberty will also have acne, and it will be more serious than before, often appearing red, swollen, abscesses and other phenomena, very easy to leave scars, seriously affecting the beauty of the face. I. Photodynamic therapy – a new technology for acne treatment In clinical applications, photosensitizers are used. Using photosensitizers at the acne site, the photosensitizers are absorbed by the sebaceous glands in the nucleus of epidermal cells and converted to porphyrin IX. Light irradiation with specific wavelengths is then used to stimulate the production of monopeptide oxygen to inactivate the cells, while destroying the sebaceous glands and reducing sebum secretion to eliminate acne. Second, the treatment principle of photodynamic acne therapy 1, through photochemical reactions to directly kill pathogenic microorganisms such as Propionibacterium acnes: Propionibacterium acnes itself can produce endogenous porphyrins, whose main components are porphyrin III and protoporphyrin IX. After giving exogenous porphyrins (photosensitizers), the endogenous porphyrins produced by acne itself can be combined with protoporphyrin IX, and after giving a certain wavelength of light. A strong photochemical reaction can occur, which can directly and effectively destroy Propionibacterium acnes; in addition, exogenous porphyrins have photoactivating and photocidal effects on other bacteria. 2. Photodynamic therapy acts directly on the sebaceous glands to inhibit sebum secretion for a long time: photosensitizers are selectively enriched in the sebaceous glands of hair follicles. 3. Photodynamic therapy can play the role of anti-inflammatory repair and prevention of scar formation: the supporting light source used, red light itself, can produce photochemical effects on living organisms, producing important biological effects and therapeutic effects, strengthening cell renewal, while enhancing the phagocytosis of white blood cells and improving the immune function of the body. 3. The advantages of photodynamic acne therapy treatment 1. Fast, safe, no side effects, no nausea, depression, thirst, etc. relative to the systemic treatment (oral medication) program 2. Reduce sebum secretion, contribute to autologous anti-inflammation, to quickly eliminate acne and acne marks 3. Reduce pores, reduce pigmentation, smooth the skin fine wrinkles 4. 5.The treatment process is mild and non-stimulating, patients feel comfortable, and the treatment is fast and effective.