You know our Prophet Job (A.S) also faced many illnesses. But Later God rewards His mercy on him with more blessings. Did you read about him??

After Satan has given up trying to turn Job away from the Lord, God removed Job's affliction and returned his family to him, doubling them in number. He returned Job's wealth and showered Job with gold. Once Job's wife had seen her husband restored to prosperity and health, she prayed thanks to God but then worried over the oath her husband had taken earlier, in which he had promised to beat her with a hundred strokes. Job was also deeply grieved over the oath he had taken, amidst his suffering. God, however, sent a revelation to Job, which told him to not beat his wife but to gently hit her with a bundle of soft grass.[7]