Law of Forgiveness
If it's true, as I believe, that the cause of many diseases is unresolved emotional issues, then certainly a common culprit is unreleased anger and resentment. What is so ironic is that these emotions are self-created; they are choices we make based on our own emotional reality.
Since they are self-created, it makes sense they can be self-destroyed, which is the purpose of forgiveness. Forgiving someone who you believe has wronged you is for your benefit not theirs!
Even the scriptures are clear about this self-righteous indignation: forgive those who have wronged you before expecting the blessings of God. Don't allow the sun to set on your anger.
If you desire to be a healer, rather than merely a spine mechanic, educate patients about the Law of Forgiveness. Forgiveness doesn't condone or approve of the behavior. It merely releases the emotional charge that's been given it.
Whom do you need to forgive?