pustŭlo, āvi, ātum, 1, v. a. and n. [pustula].
I Act. , to blister , to cause blisters or pustules; hence, mid., to blister , become blistered : ne usta pustulentur, Cael. Aur. Tard. 5, 1, 16.—
II Neutr. , to blister , break out into blisters , Tert. Hab. Mul. 6.