What causes nocturnal emission in sleep?

Urethritis

is a type of urethral inflammation, which may lead to urethral itching, increased secretions and other symptoms. In some cases, urethritis may stimulate the reproductive system, leading to nocturnal emission.

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, prostatitis

is an important organ of the male reproductive system, if infected or stimulated by inflammation, may affect the secretion of prostatic fluid, thus affecting the normal discharge of semen, and then lead to nocturnal emission.