Dua should be made for healing and good health; in particular the du’a which has been narrated from the Prophet (peace and blessings of Allah be upon him):

“Allahumma Rabb al-Nas, adhhib al-bas washfi, anta al-Shafiy, la shifa a illa shifa uka, shifa an la yughadiru saqaman (O Allah, Lord of mankind, remove the evil and grant healing, for You are the Healer. There is no healing except Your healing, which does not leave any sickness).”