Capsaicin is the active ingredient of pepper. When applied to the skin, it will dilate capillaries and promote circulation, thus making the skin red and hot, and will not burn the skin. However, if the skin is allergic to capsaicin, it is recommended not to use products containing capsaicin.

Pepper has been used to relieve pain since ancient times. Scientists have found through research that capsaicin in pepper can stimulate and exhaust the nerve conduction substance "P", which can spread pain information to the whole nervous system.

Through the analgesic principle of capsaicin, Chili sauce has been used to relieve pain such as herpes zoster and trigeminal neuralgia. At present, some manufacturers have used this principle to put capsaicin into socks and become "Chili socks" for heating in winter; Capsaicin can also dilute the mucus secreted by the throat, help to expel phlegm, and not block the respiratory tract.

"Capsaicin" is a very common ingredient in slimming cream. It claims that it can burn fat, promote blood circulation and intracellular circulation, and eliminate some toxins accumulated in the body and eliminate skin edema. But the role of capsaicin is only to dilate blood vessels and stimulate nerves.

The feeling behind the body is very "hot", which is actually the feeling of vasodilation, not fat consumption, so it has not played a very obvious slimming effect, but it will not cause harm to the skin relatively.