Red light treatments never hurt. Unlike lasers or microdermabrasion, which makes use of abrasion to change the skin’s appearance, these treatments only use light. Unlike These ablative treatments will often use heat and cause small levels of discomfort or pain. However, red light therapy treatments are non-thermal and non-invasive overall. Clients do not report discomfort during red light therapy treatments. The skin may feel warm due to the intensity of the red light treatment over an extended period of time, however, this largely depends on the length of the treatment chosen.