On one day in April 2019, I had two red bumps on my back waist. It was very itchy, but it was not very itchy in normal times. When I moxibustion, I got itchy. The blog of the online teacher said it was detox reaction. In response, I applied moxa oil on this area and then moxibustion. After half a month, the itching gradually disappeared, and the red bumps began to peel off gradually. Finally, one day, I felt From the bottom of the moxibustion box, there was a stream of heat, from the bladder meridian to the feet, a thick stream of heat, to the little toes. Then the whole foot began to heat up.