Fire needles originates from ancient nine kind of needles. its another name is feng zhen, means sharp, and closely  related to fire, now in my supervisor`s clinic, fire needles are usually used for skin disease,  such as eczema, dematitis, insect bites and stings, when we use fire needle we burnt it red even to white and then pierce to skin lesions rapidly and exactly. without retaining needle, we should prick all the skin lesions as soon as possible, after that, dark blood or liquid will pour out, do not to stop that, as it is turbility and blood stasis. Treatment of fire needle has a great effect on relieving ithing, detoxicification and repairing. it is really good.