The Dua for illness is a supplication made by a person who is facing any kind of sickness, disease or ailment. Here is the Dua for illness:

“أَذْهِبِ الْبَأْسَ رَبَّ النَّاسِ وَاشْفِ أَنْتَ الشَّافِي لَا شِفَاءَ إِلَّا شِفَاؤُكَ شِفَاءٌ لَا يُغَادِرُ سَقَمًا”

“Adhhibil ba’sa Rabbannaas, washfi antash-shaafi, laa shifaa’a illaa shifaa’uka shifaa’an laa yughaadiru saqama”

Translation: “O Lord of mankind, remove this affliction and cure the patient. You are the one who cures, there is no cure except for Your cure, a cure that leaves no illness.”

This Dua can be recited by the person who is ill or by someone else on their behalf. It is believed that reciting this Dua with sincerity and faith can bring healing and relief to the person who is suffering from an illness. It is important to remember that while making this Dua, one should also seek medical treatment and follow the advice of healthcare professionals.