* Don't curse the Fever *
The Prophet of Rahmah, the Intercessor of Ummah (May Peace and blessing of Allah be upon him)said,
‘Do not insult the fever, for it removes the sins of the son of Adam as the bellows remove the dross from iron.’
(Sahih Muslim, Hadis 2575, Page 1392)
I also used to curse it a time ago per ab nai.