Nausea and vomiting are common side effects caused by chemotherapy. Some studies have shown that acupuncture can be helpful in treating nausea and vomiting. Acupuncture uses very thin needles inserted at certain points on the body that are believed to affect bodily functions. Researchers want to study the effects on nausea and vomiting of giving electro-stimulation (using wires attached to the body to provide very small electrical shocks to the skin) to an acupuncture site, compared to giving electro-stimulation to a inactive site (a site that does not respond to acupuncture).