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NON-SPECIFIC URETHRITIS (NSU) – INTRODUCTION


A disturbing condition affecting men particularly, which appears to be sexually transmitted, has increased in reported numbers in the past two decades in several countries. In England and Wales, for example, 11,500 cases were reported from hospital clinics in 1952; ten years later this had risen to 25,000, by 1972 to 50,000, and by 1980 to over 110,000. In 1980, 40,000 more cases of NSU were reported than of gonorrhoea.

The condition is called non-specific urethritis, because no specific cause, such as gonorrhoea, trichomoniasis, chemical irritation, or anxiety-induced irritation, can be found.

About 10 to 30 days after sexual intercourse, usually with a casual partner, the man discovers that he has a discharge from his urethra, which may be clear or purulent. When he urinates, the passage of the urine along his urethra causes pain, although often this is only mild. Occasionally the symptoms are more severe. The man develops bladder pain and an urgent and frequent need to pass urine. If he seeks medical examination he should avoid passing urine for at least two hours before seeing the doctor. The doctor may massage his penis along the urethra, to express a bead of pus, or it may be present without the need to do this.

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