Hi . Most of what I have seen discusses fatigue after the prostatectomy improving several weeks after surgery. Of course, we are not medical professionals and I can't say that what you are experiencing isn't related to the surgery. I know COPD can cause fatigue (see our sister-site for COPD https://copd.net/), but you mentioned that your case is mild. Have you had a chance to speak to your urologist? Hoping you can get some answers soon. Best, Richard (Team Member)