Take a lump of figs: though the deliverance was certainly promised, yet means must be used, and those suitable; for this hath naturally a power of ripening and softening boils or sores, though that power was altogether insufficient to produce so sudden and so complete a cure. The boil seems to have been a plague-sore.
Related Commentaries of 2 Kings 20:7
2 Kings 20:7
7 And Isaiah said, Take a lump of figs. And they took and laid it on the boil, and he recovered.