David doesn't hide his pain; he admits to being "weary with groaning" and that his "bones are troubled". The description of his bed swimming with tears (v. 6) is a vivid, poetic expression of depression and exhaustion, showing that God allows us to bring our unfiltered pain to Him.

“This is an honest Psalm – and it is a Psalm about a God who hears, and what that God will do. It ends on a hopeful note – not rushing to a happy resolution, but abruptly and carefully pointing onward.” www.thomascreedy.co.uk · 3 years ago Key Themes and Observations

While not explicitly naming his sin, David acknowledges that his suffering is connected to his need for repentance. He asks for discipline, but begs that it not be in "hot displeasure," appealing to God’s mercy rather than his own righteousness.