I used to study moxa roasting with my master and used it to treat rheumatism and sciatica. Now with what I learned to give you reference: Ai hot two kinds,

1: is to use the Ai stick (drugstore available) light fire on the acupuncture points to roast, roast before, first in the points to be roasted to smear a little bit of oil to prevent the fire baked skin, can not let the Ai fire direct contact with the skin in order to prevent scalding, baked to the patient has a pain to Ai fire to move away, repeated many times (about 5-10 minutes)

2: is to use the Ai velvet light fire to roast, in the points to be roasted, the Ai velvet to the fire, the Ai velvet to the fire, to the fire, to the fire, to the point, to the fire, and then the Ai velvet to the fire, to the point of the fire. This smoke is a little, but the fire will not burn quickly, as long as you grasp the fire will not burn the skin.