Hazrat Ibn Abbasra relates that the Holy Prophetsa taught him this prayer for fever and various aches and pains:
بِسْمِ اللہِ الْکَبِیْرِ أَعُوذُ بِااللهِ الْعَظِیْمِ مِنْ شَرِّ عِرْقٍ نَعَّارٍ وَ مِنْ شَرِّ حَرِّ النَّارِ
“In the name of Allah, the Most High. We seek refuge in Him, the Greatest, from the evil of every over-active blood vessel. We seek His shelter from the affliction of the heat of the fire.”
(Sunan Ibn Majah, Kitab al-Tib)
