A red light massager is a device that utilizes specific wavelengths of red and near infrared light (typically in the 630 670nm and 810 850nm ranges) to deliver photobiomodulation therapy to the scalp. When applied, this light energy is absorbed by the mitochondria in cells, stimulating cellular metabolism and energy (ATP) production. In the context of scalp and hair health, this biochemical stimulation reduces inflammation around hair follicles, extends the growth phase of the hair cycle, and encourages dormant follicles to re enter the growth phase. It is a non thermal, non invasive technology that has been shown in clinical studies to be effective for treating androgenetic alopecia. A red light massager combines this powerful light therapy with a gentle massage function, enhancing comfort and circulation for a synergistic effect that promotes a healthier scalp and encourages thicker, fuller hair growth.