The Bible is a book of miracles, and God designed it that way to give mankind hope. One of the topics that are explored in Scripture is faith healing, or healing without the use of any instrument or medicine.
In both the Old and New Testaments, a few chosen men of God were given the ability to heal sicknesses even without medicine knowledge. This is to confirm to other people that they are indeed God-sent, and what they would say or do is the will of God. However, the Scriptures say that when that which is perfect has arrived, that is the Word of God, some of these gifts would cease as well.
While we cannot discount the fact that God is still able to heal based on His own prerogative, man should not easily believe various individuals who claim that they can. It is all in the hands of God.
What Bible verses talk about faith and miraculous healing?