Condition: Deafness
In Isaiah 29:18 and Isaiah 35:3-6, we see that Christ will take away deafness when He comes to reign on the earth. Where Jesus has His way, deafness leaves.
In Matthew 11:4-5 and Luke 7:20-23, the fact that the deaf are hearing is cited as a proof that Jesus is the promised Messiah.
In Mark 7:32-37, Jesus healed a man who was deaf and had a speech impediment. There is no record that any demon was involved because Jesus did not cast any demon out of the man.
On the other hand, the boy whom Jesus delivered in Mark 9:17-29 had a “deaf and dumb spirit.” In Matthew 12:22, Jesus healed a speechless man who was also blind and deaf. In this case, an evil spirit was responsible for the condition.