Do you have 6 years? Seriously though, I think I’ve been asking this same question about most things since I was a child. The short answer is that acupuncture needles trigger electrical and chemical cascade processes in your body that stimulate the production of neurotransmitters and hormones that allow your body to more freely return to its goal of homeostasis. Basically, the needles tell the chemicals in your body what to do to relax, balance and heal.