What is acne? Acne is a chronic inflammatory disease of the sebaceous glands of the hair follicles. The lesions appear as pimples (including whiteheads and blackheads), papules, pustules, and cystic nodules. In addition to affecting aesthetics, acne also causes a great deal of psychological shadows and affects the physical and mental health of adolescents. Acne Prevention To prevent acne, it is important to eat less spicy and stimulating foods, eat more vegetables and fruits, and keep your bowels open. Choose the right facial cleanser and moisturizer according to your skin type. Topical medications such as mupirocin ointment (Bactrim) can be used when acne symptoms are mild, and oral medications such as erythromycin antibiotics, retinoic acid, and herbs to clear heat and detoxify the skin can be added when symptoms are severe. New Acne Treatment – Laser Therapy Red and blue light has antibacterial and anti-inflammatory effects and can treat mild to moderate acne, especially in patients with more papules and pustules. Photodynamic therapy is a new treatment technology that selectively destroys lesions through photodynamic reactions by combining photosensitizers and corresponding light sources. It can be used for severe acne, including cystic acne. Acne marks and scars can be treated with fractional laser for skin reconstruction or with photorejuvenation.