A doctor of medicine told me that natural capsaicin itself has certain medicinal value, but it must be chemically synthesized capsaicin, otherwise it would be impossible to integrate it into rubber particles and have a spicy feeling for such a long time. Chemical capsaicin has no medicinal value except temporary pungent feeling. Long-term use of chemical substances will definitely decompose and fail, and the decomposed substances are likely to be harmful to human body. However, due to the small amount and slow process, human body cannot detect it.

Spontaneous fever is caused by capsaicin or other chemicals that irritate the skin. The fever is uncontrollable and won't last.