Blue light treatment for acne is generally not harmful to the body. The blue light treatment process is safe and free of side effects, will not produce dependence, and the blue light treatment is gentle and does not produce thermal effects, there is almost no irritation to the skin, the treatment process is painless and will not affect the skin. The choice of blue light treatment for acne is the use of blue light can kill Propionibacterium acnes as well as inhibit the role of sebaceous gland secretion, the treatment should pay attention to the protection of the eyes, to avoid damage to the retina caused by blue light. After the blue light treatment, you must pay attention to strengthen the skin care, avoid scratching, avoid excessive stimulation, and pay attention to good sun protection. When you need blue light treatment, you must choose a regular medical institution for consultation and follow the doctor’s instructions.