Reactive perforating collagenosis is a form of perforating dermatosis due to transepithelial elimination of collagen and characterized by itchy papulonodular eruptions frequently seen in patients with diabetes mellitus and end stage renal failure. Pruritus is often severe and treatment is difficult. Two adult Chinese diabetic patients with acquired reactive perforating collagenosis unresponsive to topical therapies and oral antihistamines, were treated with transcutaneous electrical nerve stimulation. There was a significant reduction of itch followed by gradual resolution of the skin lesions.