Moxibustion blisters may be caused by too long moxibustion time or too much moxibustion. If you don’t have any health problems, it is recommended to moxibustion once a week for about 3-5 minutes per point. If you have a cold, flu or other ailments or a heavy body cold, you can moxibustion the corresponding acupuncture points for a longer time. If the moxibustion time is too long or too frequent it will blister, it may also be a detoxification reaction, if the cold and dampness is relatively serious and there is a disease evil that needs to be expelled, it will blister. Blisters are the channel through which evil Qi is expelled from the body, which is the most common reason for moxibustion blisters. In addition, it can also be a burn. If the moxa stick is too close to the skin and causes burns, blisters can also appear.