

The Messenger of Allaah 'alaihi wa sallam said, meaning,
"Do not revile fever disease, because the real (the disease) God will mengahapuskan sin of Adam as a child's furnaces eliminates the iron impurities. (Narrated by Muslim)
Therefore, not permissible for a believer to berate her illness, grumbling, let alone to think on God berburuk with disaster illness. Rejoice, O my brother, indeed the Messenger of Allaah 'alaihi wa sallam said,
"Pain fever every believer away from the fire of Hell."
(Narrated by al-Bazzar, shohih)