They may originate as pustules or may develop form papules or vesicles, passing through transitory early stages, during which they are known as papulopustules or vesicopustules.

• 脓疱可以起病即为脓疱，或丘疹、水疱经过短暂的早期阶段发展而成，称为丘疹性脓疱或水疱性脓疱。