URETHRITIS - inflammation of urethra CAUSES Gonococcal urethritis. Nongonococcal urethritis: Trichomonal urethritis. Lymphogranuloma venereum (LGV). Mycoplasma. Ureaplasma urealyticum. Candida. Trauma Catheters Cystoscopes stones. Chemical urethritis. Reiter’s disease: Arthritis, conjunctivitis, urethritis. Allergy.