Oppression and possession
Here is an article that to my mind differentiates the two
Is it possible for a Christian to be demon-possessed?
The real problem is we are often people whose focus goes elsewhere.
It is always easier to blame someone else or something else rather than an issue
with our approach.
So we have the "flesh", or total inability to walk in righteousness.
Demonic attacks, bad upbringing, a wrong theology etc.
Now my answer is simpler still, the closer you walk with Jesus the more you
show the fruit of the Spirit. So dwelling in Gods word in your heart, seeing
the good and opportunity to help others.
Jesus is always right, so let us go to Him with our issues and see what He
has to say through His word, and to our spirits.