Lichen (xiǎn) of the anterior and posterior yīn, i.e., the anus and genitals, and surrounding areas; attributed to wind-heat-damp invading the skin. It starts with papules or small vesicles that gradually spread to form clearly circumscribed patches that are covered with thin scales.
Biomedical correspondence: tinea cruris.
Medicinal therapy: Apply No.1 Lichen Medicinal Water (一号癣药水yī hào xiǎn yào shuǐ) or realgar (Realgar, 雄黄xióng huáng) (12 g) steeped in 100 ml old vinegar.
Acumoxatherapy: Base treatment mainly on BL, LI, SP, ST, and LR. Select a number of points from the following: BL-12 (Wind Gate, 风门 fēng mén), BL-18 (Liver Transport, 肝俞 gān shù), BL-40 (Bend Center, 委中 wěi zhōng), LI-11 (Pool at the Bend, 曲池 qū chí), SP-9 (Yīn Mound Spring, 阴陵泉 yīn líng quán), BL-20 (Spleen Transport, 脾俞 pí shù), SP-6 (Three Yīn Intersection, 三阴交 sān yīn jiāo), ST-44 (Inner Court, 内庭 nèi tíng), LR-2 (Moving Between, 行间 xíng jiān), and GB-34 (Yáng Mound Spring, 阳陵泉 yáng líng quán); needle with drainage.