METHOD: This was a randomised, controlled, single-blind clinical trial conducted in Guangzhou, China. Eighty-four outpatients with psoriasis vulgaris were randomised to a treatment group (43 cases treated by auricular therapy combined with optimised Yinxieling formula) and a control group (41 cases treated by optimised Yinxieling formula alone). The treatment duration for both groups was eight weeks. Auricular therapy comprised of bloodletting puncture of the auricular points on the back of ear and vaccaria seeds pressure on Lung (CO 14), Liver (CO 12), Shenmen (TF4), endocrine (CO 18), and Pizhixia (AT4). Each ear was treated every other week for eight weeks in total. Both groups were treated with optimised Yinxieling formula decoction, which was a hospital preparation.
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