Effects of mud-bath treatment on fibromyalgia patients: a randomized clinical trial.

The efficacy of balneotherapy in fibromyalgia syndrome (FS) has been well demonstrated, while controlled studies using mud packs are lacking. We performed a randomized clinical trial to evaluate the effects and the tolerability of mud-bath treatment in FS patients, who are poor responders to pharmacological therapy. Eighty patients with primary FS, according to ACR criteria, were randomly allocated to two groups: 40 were submitted to a cycle of 12 mud packs and thermal baths, and 40 were considered as controls.