Can acupuncture puncture a lung?

Very rarely: This might be theoretically possible, but when done properly acupuncture should never puncture a lung (and i not aware of a single instance when this has happened). A needle would have to go an inch or more below the skin to puncture the lung and acupuncture needles are placed barely into the skin, typically just 1 or 2 millimeters.

Yes, rarely: With well-trained acupuncturists, puncturing a lung is rare -- but is still one of the known risks depending on location of points needled. Pneumothorax would result, and could require chest tube to reinflate the lung. Certain precautions are taken to decrease the likelihood of this happening. For certified acupuncturists who know these well, see http://www.Nccaom.Org/.

Rare: Acupuncturists are trained when dealing with specific major acupuncture points around that part of the body to place the needle obliquely & to wodge the skin between their finger & thumb. If done properly, the lung should not be punctured. But there are instances when it has occurred due to improper technique. Very shallow insertions are not deep enough to reach the lung.

Extremely Rare: All practitioners are trained specifically in the risks and benefits associated with acupuncture. Physicians (Medical Doctors, Doctors of Osteopathy, Doctors of Chiropractic) trained in acupuncture are particularly well versed in proper protocols to reduce risks and increase likelihood of a positive outcome.