Unlike hypodermic needles, acupuncture needles are solid and hair-thin, and they are not designed to cut the skin. They are also inserted to much more shallow levels than hypodermic needles, generally no more than a half-inch to an inch depending on the type of treatment being delivered.
While each person experiences acupuncture differently, most people feel only a minimal amount of pain as the needles are inserted. Some people reportedly feel a sensation of excitement, while others feel relaxed. If you experience significant pain from the needles, it may be a sign that the procedure is being done improperly