'Illness' in the Bible

When there is famine on the earth,when there is pestilence,when there is blight, mildew, locust, or grasshopper,when their enemies besiege themin the region of their fortified cities,when there is any plague or illness,

whatever prayer or request is made, no matter whether it's made by a single man or by all of your people Israel, each praying out of his own illness and anguish and stretching out their hands toward this Temple,

And in the thirty-ninth year of his reign, he fell {severely} ill in his feet. But even in his illness he did not seek Yahweh, but [only] among the healers.

and you will suffer a severe illness, an intestinal disease, until your intestines come out because of the sickness, day after day.’”

After all of this happened, the LORD struck him in his bowels with an incurable illness.

And it happened [that] {after many days, at the end of two years}, his bowels came out because of his illness, and he died in terrible agony. And his people did not make a fire for him like the fire for his ancestors.

In those days Hezekiah was stricken with a terminal illness. He prayed to the Lord, who answered him and gave him a sign confirming that he would be healed.