Lidocaine Injection May Help Treat Fibromyalgia, Study Suggests

People with fibromyalgia complain of chronic pain throughout their body as well as an increased sensitivity to pain. Doctors often have trouble treating this pain because it's unclear what causes it, the study authors noted. In the new study, injecting lidocaine into peripheral tissues -- such as the muscles in the shoulders or buttocks - effectively reduced pain sensitivity, the researchers found.