SubhanAllah! May Allah grant him shifa with His Mercy and Blessings. Ameen.
Abu Hurairah reports that Allah's Messenger, peace be upon him, said: "For every misfortune, illness, anxiety, grief, or hurt that afflicts a Muslim -even the hurt caused by the pricking of a thorn - Allah removes some of his sins." Ibn Mas'ud said: "I visited the Messenger of Allah, peace be upon him, while he had a fever. I exclaimed: 'O Messenger of Allah! You have a high fever! ' He said: 'My fever is as much as two among you [might have]. ' I asked: 'Is it because you have a double reward?' He replied: 'Yes, that is right. No Muslim is afflicted with any hurt, even if it is no more than the pricking of a thorn, but Allah wipes off his sins because of it and his sins fall away from him as leaves fall from a tree'."