I am 23. I have been masturbating since 12. Suddenly one day during masturbation I felt a cutting pain sensation in urethra opening. After some days urethritis by e.coli happened. I take treatment. Now no bacteria shows in urine test but during urination I have to give a strain and after that feel does not empty bladder and a cutting pain occur at starting toilet. Sometimes easy feel to urination. But I feel a prickly sense many times at glans root when I am no urination. During foreplay premature ejaculation occur now and discomfort in testicles and lower left buttock inflammation type pain happen. Why is it happen. Please suggest me some advices.