Hidden pain at the tip of the penis may be associated with urinary tract infections such as cystitis, prostatitis or stones. 1. Cystitis: the main triggers are unclean sexual intercourse, catheterization and individual reasons. The main manifestations include frequent urination, painful urination, burning sensation in the urethra during urination, etc. Terminal hematuria can be seen. 2. Prostatitis: the general causative agent is Escherichia coli. The main manifestations are sudden onset, sudden urinary stimulation symptoms such as urinary pain, urinary urgency, etc., there will also be hesitation in urination, intermittent urinary line and other symptoms. 3. Stones: can also cause similar symptoms. Generally, ureteral stones, when located in the bladder wall, can cause severe pain in the lower back, and radiate to the groin and head of the penis on the same side. Bladder stones can also cause pain in the head of the penis and distal urethra. The above symptoms may also be caused by other factors. Patients are advised to go to regular hospitals for timely consultation and treatment for early recovery.