'Heal' in the Bible

"Go back and tell Hezekiah, the leader of my people: 'This is what the Lord God of your ancestor David says: "I have heard your prayer; I have seen your tears. Look, I will heal you. The day after tomorrow you will go up to the Lord's temple.

Hezekiah had said to Isaiah, "What is the confirming sign that the Lord will heal me and that I will go up to the Lord's temple the day after tomorrow?"