What type of therapy utilizes visible light for skin treatment purposes?

Phototherapy is the type of therapy that utilizes visible light for skin treatment purposes. This method involves the use of specific wavelengths of light to treat various skin conditions, such as acne, psoriasis, and eczema, by promoting healing and reducing inflammation. Phototherapy can also stimulate collagen production, improve skin texture, and address pigmentation issues.

In contrast, color therapy focuses on the psychological and emotional impacts of color rather than using specific wavelengths for targeting skin conditions, making it less effective for tangible skin treatments. Heliotherapy involves exposure to sunlight to treat ailments, which is broader and does not specifically focus on the visible light spectrum or controlled treatment that phototherapy offers. Sound therapy utilizes sound waves as a healing modality and does not involve light at all, thereby categorically differing from the idea of a therapy based on visible light for dermatological purposes.