Small abdominal distension with a desire to urinate and discomfort at the root of the penis (i.e. perineal discomfort) may be related to urinary system diseases such as infections and stones, and reproductive system diseases such as inflammation and tumors. 1. Urinary system diseases. Common infections such as prostatitis, urethritis; stones such as bladder stones, there will usually be frequent urination, urinary urgency, urination, urination difficulties such as dribbling, interruption of urination, perineal discomfort or pain, abdominal drop sensation and other abnormal symptoms. 2. Reproductive system diseases. The common ones are epididymitis, prostate cancer, penile cancer and so on. Usually there are also symptoms such as abdominal distension, abdominal lumps, frequent urination, perineal discomfort, and can also have hematuria. Abdominal distension with urination and discomfort at the root of the penis need to actively seek medical attention and follow the doctor’s instructions for reasonable treatment.