Fig. 3From: Acupoint herbal plaster for patients with primary dysmenorrhea: study protocol for a randomized controlled trialIllustration of the sticky plaster. a and b show the anterior and posterior appearance of the acupoint plaster, respectively. c and d show the paste inside the plaster. c demonstrates the herbal plaster. d demonstrates the bluckwheat plaster. These two kinds of paste are indentical in appearance. The Figs. are only for illustrative purposesBack to article page