The present invention is directed to methods for treating Dupuytren's disease, osteoarthritis, and adhesive capsulitis. The method comprises the steps of identifying a subject in need thereof, and administering to the subject an effective amount of one or more rhamnolipids, optionally in combination with niclosamide. A pharmaceutical composition comprising rhamnolipids, optionally in combination with niclosamide or a salt thereof, can be applied by any accepted mode of administration including oral, topical, or injection within or around the affected body part such as an affected hand, knee, or shoulder.