Wu Collection, Middle Volume Radical: Sickness (bìng) Feng (mad/insane) Kangxi strokes: 14 Page 776, Entry 20 According to the Collected Rhymes (Jiyun), pronounced feng. Refers to a mental disorder or madness. The Medical Compendium (Fangshu) states: Migraine is categorized as phlegm and heat when on the right side, and as wind and blood when on the left side.