There are two kinds of areae. Both of them agree in this, that the surface of the skin mortifying, the hairs first decay, and then fall off; and if the part is wounded, thin and fetid blood is discharged; and both kinds increase in some people quickly, in others slowly. It is then worst, when it has rendered the skin thick and fat, and entirely smooth. That, which is called alopecia[ FR ], spreads in no certain form. It is found both in the hair of the head, and in the beard. But that, which from its likeness to a serpent is called ophiasis[ FS ], begins at the hinder part of the head; its breadth not exceeding two fingers; it creeps with two heads to the ears; in some, even to the forehead, till the two heads are joined in the fore part. The former species happens at any age; the latter commonly to infants. The first hardly ever terminates without medicine; the other often goes away of itself.

Some scarify these kinds of areae gently with a knife. Others anoint them with escharotic medicines mixed with oil; and especially burnt paper. Others apply turpentine resin with thapsia. But nothing is better than daily shaving with a razor; because, when the cuticula is gradually cut off, the small roots of the hairs are laid bare. Nor should this be given over, till it appears, that the hair grows thick. It is sufficient to rub the part, that is frequently shaved, with copperas.