There is some evidence that acupucture causes the release of peptides in the central nervous system (CNS) which modulates sensory information travelling from the body to the brain. It is also well-documented that TENS machines (devices that release small amounts of electric current on the surface of the skin) seem to provide effective pain relief.

A lot of anecdotal evidence exists both for and against acupuncture and what is needed are some reliable studies. Whether or not it works, acupuncture is a harmless treatment.

The multiple sclerosis symptom that acupuncture is reported to work best for is the pain associated with facial neuralgias (especially trigeminal neuralgia). But claims have also been made for it's palliative effects with numbness and neck pain.

Acupuncture Links:
Acupuncture.com
Acupuncture Home Page
Neuroscience, Neurophysiology and Acupuncture

MS Glossary
All About Multiple Sclerosis