What Infrared (IR) Radiation Does to Skin
Infrared radiation rays, a type of solar radiation that makes up about 40% of the energy that reaches Earth's surface, can have both positive and negative effects on skin:
Positive effects
IR can penetrate deep layers of the skin, promoting cell repair and pain relief. It can also help with skin conditions like psoriasis, scars, and acne, and treat skin issues like wrinkles and stretch marks. Some studies suggest that IR-A wavelengths in sunlight may even help prepare the skin for the damaging UV radiation that comes in the middle of the day.
Negative effects
IR can also cause heat to build up in the skin, which can increase the risk of premature aging, inflammation, and DNA damage. IR can also trigger heat-induced responses like hydration loss and the degradation of collagen and elastin. Some sunscreens block IR radiation.
Can You Feel Infrared Radiation Rays on Your Skin?
When your skin is exposed to infrared radiation, it converts it into heat. During this process, your skin's temperature can raise to more than 104ºF, when its normal temperature is around 92ºF. With this temperature increase, inflammatory cells are triggered and DNA damage results.
Can Infrared Radiation Rays Cause Cancer
According to a 2013 NCBI article, there is no clear evidence that exposure to infrared (IR) radiation increases the risk of skin cancer. However, repeated exposure to high IR temperatures can cause skin issues like hyperpigmentation, scaling, and increased skin thickness. IR light can also cause thermal injuries to the eyes, even if you don't feel pain.
Some say that infrared saunas emit a safe, invisible type of radiation that doesn't damage cells, and therefore can't cause skin cancer or other cell mutations. In fact, some say that infrared saunas can even help cancer patients during treatment. The Mayo Clinic also says that no harmful effects have been reported with infrared saunas, and that they might be a good option for relaxation.