FIR heat is so safe that neonatal care units now use infrared heating systems to keep infants warm. For the last 40 years western researchers and clinicians have done extensive studies on the healing power of FIR energy and have made some startling discoveries. For example, the Respiratory and Stress Care Center in Japan conducted a study of patients giving them daily infrared treatment. After 15 to 25 sessions in a FIR sauna, the patients showed significant improvement in pain.


Thermal therapy using ray dry sauna was performed for patients with chronic fatigue syndrome (CFS). Symptoms such as fatigue, pain, and low-grade fever were dramatically improved on two patients. And prednisolone administration was discontinued and became socially rehabilitated 6 months after discharge. On other 11 patients with CFS, physical symptoms such as fatigue and pain improved, too. Furthermore, we reported that repeated thermal therapy had relaxation effect and diminishes appetite loss and subjective complaints in mildly depressed patients. These results suggest that repeated thermal therapy may be a promising method for the treatment of CFS.