How do you define this. If you stop and think about this it could be many things.
5. Bad habits.
The stronghold which is a bad thought or habit begins in your mind and then travels outward. How do you change it you ask?
By studying God's word and changing your behavior through his book.
Maybe God's allowed you to be broken
so you could finally be healed; to finally see that you really do need
Him, to be forgiven by Him, to have a personal relationship with Him, to
actually take personally for yourself what Jesus did on the cross to
tear down the wall between you and God.
A point to ponder...