Red Light Therapy uses low-level wavelengths of red light to treat skin issues, promote healing, increase collagen and elasticity to the skin as well as many other health benefits. This therapy involves closely exposing the body to red light which penetrates the skin and stimulates cellular function.
Red light is near infrared (more superficial) and sauna is far infrared (penetrates deeper).
A Hungarian physician Endre Mester in the 1960's. Experimenting on rats with red light led to hair growth and wound healing!
Exfoliate the skin! This will facilitate deeper penetration of light into the skin.
Clothes, so expose that skin!!
Sunscreen can prevent the light from penetrating as deeply.