Wu Collection, Middle Volume Radical: Skin (pí) Kangxi Strokes: 16 Page 792, Entry 03 Pronounced zha. According to the Classified Chapters (Leipian), it refers to a blister on the nose. In the Yellow Emperor's Inner Canon (Huangdi Suwen), it states: If one sweats from labor and is exposed to cold wind, the pores contract and it becomes zha. Note: Commonly referred to as acne. Also, according to the Correction of Characters (Zhengzitong), it refers to red blotches resembling sores that rise on the surface of the skin; when appearing on the face or nose, it is called wine-zha. Also, according to the Five Sounds Collected Rhymes (Wuyin Jiyun), it is pronounced cu. According to the Broad Museum (Boya), it is the same as chapped or rough skin. According to the Jade Chapters (Yupian), it is now written as zha. According to the Classified Chapters (Leipian), it is interchangeably written as zha. Commonly written as zha.