The Word of God has power to heal when you believe it and say it with your mouth. God does not lie. The Father put (past tense) your infirmities and mine on Him. The Father put your sickness and mine on Him.
Since the Lord Jesus took our infirmities and sicknesses thousands of years ago, what you have on you now can go! You can say to yourself:
You, sicknesses and diseases, you are not suppose to be in or on me! My Lord Jesus took you from me thousands of years ago. You don’t belong to my body. Jesus is my Lord. I am redeemed of the Lord. I am one with Christ. There is no sickness nor diseases in Christ again. So you cannot be in me. I command you in the name above all names, in the name of Jesus Christ that you go NOW! I believe. I was healed by His stripes.
Simple as ABC. Don’t flinch at that prayer. Even if you still feel the symptoms, keep declaring to yourself, “He Himself took my infirmities, and bore my sicknesses. By His stripes I was healed. You are no longer in me. I give thanks to my Father. Hallelujah!”
Whatever else you are doing, do it in faith. Keeping thanking God even if the physical manifestation tarries. Keep giving glory to God. Keep telling your spirit, “He Himself took my infirmities, and bore my sicknesses. By His stripes I was healed. You are no longer in me.”