Medicine is used to relieve diseases. God is displeased when Christians do not seek God first for their cures. We have found that demons come into a person when they have an operation and are given an anesthetic. Demons also come into the child during birth by operation and drugs. Other verses make a strong reference to this phenomenon.
Demons can lie dormant while waiting for the right opportunity to strike.
They can be in the body due to inherited sins from the ancestors. Behind a screen of bitterness, rebellion, ingratitude, and rejection hide evil spirits which work on the mind and on body chemistry and cause disturbances in physical, mental and emotional health. God has designed all the parts of the human body to work in harmony. In some cases a person will repent of their sins and forgive all who have hurt them and receive healing but will later allow themselves to get into a pattern of unforgiveness again and allow the problem to reoccur. Acupuncture and Acupressure.