6 Bible Verses about Demons Causing Illness

A man from the crowd answered Him, "Teacher, I brought my son to you, for he has a dumb spirit. Wherever it seizes him, it convulses him, and he foams at the mouth and grinds his teeth; and he is wasting away. So I asked your disciples to drive it out, but they could not do it." He answered them, "Oh, you unbelieving people of the times! How long must I be with you! How long must I put up with you! Bring him to me."read more.
And they brought the boy to Him. As soon as the spirit saw Him, it convulsed the boy, and he fell on the ground and kept rolling over and foaming at the mouth. Then He asked his father, "How long has he been like this?" He answered, "From his childhood; and many a time it has thrown him into the fire or into the water, to destroy him. But if there is anything you can do for him, do pity us and help us!" Jesus said to him, "If there is anything I can do! Everything is possible for him who has faith!" The boy's father at once cried out and said, "I do have faith; help my lack of faith!" Then Jesus, because He saw that a crowd was rushing up to Him, reproved the foul spirit and said to it, "You deaf and dumb spirit, get out of him, I charge you, and never get into him again." Then it gave a shriek and violently convulsed the boy, and got out of him. And the boy looked like a corpse, so much so that the people said that he was dead. But Jesus grasped his hand and raised him, and he got up.

When they reached the crowd, a man came up to Him, kneeling before Him and saying, "Lord, do pity my son, for he has epilepsy and suffers excruciating pain, and often falls into the fire or into the water. I brought him to your disciples, and they could not cure him."read more.
And Jesus answered, "O you unbelieving and perverted people of the times! How long can I put up with you? Bring him here to me!" And Jesus reproved the demon, and it came out of him, and the boy was cured that very moment.

The next day, when they had come down from the mountain, a great crowd met Him. Then a man in the crowd at once shouted, "Teacher, I beg you to look at my son, because he is my only child; all at once a spirit seizes him, and he suddenly screams, and it convulses him until he foams at the mouth, and in a struggle it bruises him and then leaves him.read more.
I begged your disciples to drive it out, but they could not." Then Jesus answered, "O you unbelieving, stubborn people of the times! How long must I be with you and put up with you? Bring him here to me." Even while the boy was coming to Him, the demon dashed him down and convulsed him, but Jesus reproved the foul spirit and cured the boy and gave back to his father.

But at the very time they were going out, some people brought to Him a dumb man, who was under the power of a demon, and after the demon had been driven out, the dumb man could talk. So the crowds were dumbfounded, saying, "Never before among the Jews was anything like this?

Now He was driving a dumb demon out of a man, and when the demon went out of him, the dumb man spoke. The crowds were astonished.

and there was a woman there who for eighteen years had had a disease caused by a spirit. She was bent double and could not straighten herself up at all.