After all this, the LORD afflicted Jehoram with an incurable disease of the bowels.
Here we have, I. A warning from God sent to Jehoram by a writing from Elijah the prophet. By this it appears that Jehoram came to the throne, and showed himself what he was before Elijah's translation. It is true we find Elisha attending Jehoshaphat, and described as pouring water on the hands of Elijah, after the story of Elijah's translation (Kg2 3:11); but that...
Commenting on 2 Chronicles 21:12-20
The Lord smote him - "And after all these things the Word of the Lord smote his bowels," etc. - Targum.
2Ch 21:18 The second punishment fell upon the body and life of the king. The Lord smote him in his bowels to (with) disease, for which there was no healing. מרפּא לאין is in apposition to לחלי, literally, “to not being healing.”