ANNALS OF INTERNAL MEDICINE: A randomized trials shows eight weeks of electro-acupuncture increased complete spontaneous bowel movements and is safe for the treatment of chronic severe functional constipation.
Read the article here: http://annals.org/aim/article-abstract/2552074/acupuncture-chronic-severe-functional-constipation-randomized-trial?doi=10.7326%2fM15-3118