Moxibustion can be performed on rainy days, but care needs to be taken to avoid catching a cold. Moxibustion is a heat therapy that combines the medicinal effects of moxa leaves to unblock meridians, dispel wind and cold, and activate blood flow. Therefore, rain does not affect the effectiveness of moxibustion. The warming effect of moxibustion promotes blood circulation and unblocks the meridians, thus exorcising cold and relieving uterine cold, dysmenorrhea, diarrhea, etc. For people suffering from joint-related diseases, the symptoms may be aggravated on rainy days, such as joint pain and numbness of limbs, etc. Moxibustion can also provide relief and reduce discomfort. Due to the warming effect of moxibustion, there may be sweating after performing moxibustion, which can open the pores and easily lead to the invasion of cool air and induce colds. Therefore, during moxibustion, keep the indoor environment at a suitable temperature, reduce the exposed area of the skin, and close the outer windows to avoid cold wind entering the room and causing a cold. If you get a cold after moxibustion on a rainy day without proper warming measures, you can drink some ginger sugar water to disperse cold and sweat to relieve the discomfort. If you can’t get relief, you can brew Banlangen or cold punch to help your body recover.