For Isaiah had said, Let them take a lump of figs, and lay it for a plaister upon the boil, and he shall recover.
Lump of figs - a round cake of figs pressed into a mass (1 Samuel 25:18). God works by means, the meanest of which He can make effectual.
Boil - the inflamed ulcer or carbuncle. Meade thinks Hezekiah's sickness was a fever terminating in an abscess.