'Confess' in the Bible

When I refused to confess my sin, my whole body wasted away, while I groaned in pain all day long.

Then I confessed my sin; I no longer covered up my wrongdoing. I said, "I will confess my rebellious acts to the Lord." And then you forgave my sins. (Selah)

Yes, I confess my wrongdoing, and I am concerned about my sins.