Acupuncture is one of the few medicines that can be considered to have nearly 300 years of clinical trial. The main function of acupuncture is to balance "chi" in the body.  When one's life is out of balance from trauma, stress, bacteria/viruses, toxins, nutrition deficiency, hormones, insomnia etc..., one's "chi" will get out of balance. When "chi" is out of balance, numerous problems will come as a consequence.