Discharges puss when used externally for boils. za o jiao ci uses: early stages of boils , difficulty in discharging of pus, eczema, and leprosy.

• 皂角刺熬膏外敷可治疮肿未溃者，有散结消肿之效。痈肿初起，脓成不溃，痈肿疮毒，麻风，疮癣。