You should do Ruqya on yourself so that Allah would cure you from your illness.

You should recite the whole of Suratul Baqara in the house so that the devils would exit it.

You must bring a glass of water – preferably zamzam – and recite 3 or 5 times suratul Fatiha, ayatul Kursi and the last 3 Surah in the Quran and then blow on the water and then drink that water and wash your face with some of it in the morning, after noon and before going to bed and you will find relief in that as only Allah can cure your illness, if you have full trust and dependence on Him.