Prostate fluid in the urethra in the morning may be caused by nocturnal sexual arousal, excessive accumulation of prostate fluid, and inflammation of the prostate gland. 1. Nocturnal sexual arousal: some people become sexually aroused at night, the penis will erect, and the prostate gland will secrete fluid, which is a normal physiological reaction and does not require special treatment. 2. Excessive accumulation of prostate fluid: under normal circumstances, the prostate gland will store prostate fluid, when it is too much and more than the body’s ability to store prostate fluid will be properly secreted from the prostate gland, which is also a normal phenomenon. 3. Inflammation of the prostate gland: When the prostate gland is infected or when aseptic inflammation occurs due to injury, the prostate gland may be stimulated to secrete prostate fluid. If it is a disease related to the prostate, it is recommended to go to the hospital to get a clear diagnosis.