In acupuncture we use tiny needles to stimulate the bodies own healing response. The needles are so tiny you can barely feel insertion, however a sensation after insertion is desired.
There are many different ways to treat low back pain using Chinese medicine, acupuncture is one of them. Cupping, moxa and guasha are also indicated. . . "A 2012 analysis of data on participants in acupuncture studies looked at back and neck pain together and found that actual acupuncture was more helpful than either no acupuncture or simulated acupuncture." - NCCIH