These days it is good to know a dua for shifa! Recite this for all illnesses and diseases. 

يَا مُنْزِلَ الشِّفَآءِ وَ مُذْهِبَ الدَّآءِ اَنْزِلْ عَلٰى وَجَعِيَ الشِّفَآءِ. اشْفِ أَنْتَ الشَّافِي لَا شِفَاءَ إِلَّا شِفَاؤُكَ شِفَاءً لَا يُغَادِرُ سَقَمَاً

yaa munzelash shefaaa-e wa muzhebad daa anzil a’laa waja-e’yash shefaa. Ishfi aan-tash-shafee la shifa-aa illa shifa-uook shifaal laa you-ghaa de-ru saqamaa

O Bestower of healing and Remover of illness, send down healing for my Diseases.’ give shifa, You are the One who cures, there is no cure except Your shifa, a cure that will not leave any sickness. Amin