Acupuncture.
Researchers at the National Institutes of Health (NIH) have found that acupuncture can provide relief from chronic pain. Although study results on the effects of acupuncture on symptoms of IBS have been mixed, some people use acupuncture to help relax muscle spasms and improve bowel function. If you'd like to try acupuncture, ask for a referral from someone you know who has had these treatments. Keep in mind that you may not experience immediate effects from nontraditional therapies and may require more than one session.

Herbs.
Peppermint is a natural antispasmodic that relaxes smooth muscles in the intestines. As with acupuncture, study results haven't been consistently positive, but if you'd like to try peppermint be sure to use enteric-coated capsules. Peppermint may aggravate heartburn. Before taking any herbs, check with your doctor to be sure they won't interact or interfere with other medications you may be taking.