Why does sometimes my right testis veins swells and pain after urination? it lasts for 30 minutes & back to normal. burning sensation sometimes

See answer: Your symptoms are somewhat atypical. If you truly have enlarged veins within the scrotum, would be consistent with a varicocele. That said, they are much more common on the left side, are usually asymptomatic, and would have no connection to the act of urination. Non-bacterial prostatitis is common in young males and may be associated with testicular pain and burning sensation. See md if persists.