Blue light therapy is a type of treatment that uses blue light to kill acne-causing bacteria on the skin. It is often used in dermatology clinics as a non-invasive and effective way to treat acne, as well as other skin conditions such as psoriasis and eczema. The blue light targets the bacteria that cause inflammation and breakouts, helping to reduce the appearance of acne and improve skin texture. Blue light therapy is safe for most skin types and can be used alone or in combination with other acne treatments.