Conventional treatments for acne are often unsatisfactory and are often accompanied by certain side effects. Topical medications have long treatment cycles and can cause dry flaky, red skin. And they do nothing to help with the scarring and marking of acne. Oral antibiotics can cause a burden on the gastrointestinal tract, leading to dysbiosis and bacterial resistance. Therefore it is necessary to seek a combination of treatments to completely resolve acne troubles. The mechanism of intense pulsed light treatment for inflammatory acne: 1. Intense light can break down blackheads and is a smooth secretion of hair follicles. 2. Intense light can activate protoporphyrin and kill Propionibacterium acnes. 3.Strong light can reduce the size of sebaceous glands that proliferate in acne skin, thus ending the greasy appearance and making the skin clean. 4.Strong light has a light-regulating effect, which can directly play an anti-inflammatory role. 5.Strong light can selectively decompose the red marks of acne. 6. Intense light can help the collagen of the dermis to be renewed as well as reshoot, which is beneficial to the recovery of acne scarring. With the introduction of fractional laser, we can make faster, stronger, and more complete restoration of acne scarring and marks based on intense light treatment. Fractional laser uses extremely small (one-twentieth of a hair) laser pulses to penetrate deep into the dermis in a matrix fashion to vaporize and exfoliate scar tissue. The normal skin between the fractions rapidly initiates the lateral repair of the scar. The thermal effect produced by the laser stimulates collagen renewal as well as collagen rearrangement. The thermal effect also kills the acne bacterium and causes the hypertrophic sebaceous glands to shrink, reducing the recurrence of acne. The full-face treatment takes about 20 minutes and has an approximate recovery period of 3-5 days. The treatment can be effective for up to 5-10 years.