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What causes brown semen in males?

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October 21, 2009 4:13AM

Although doctors can't generally pinpoint the cause, brown semen is often caused by blood in the semen. It's usually harmless and it usually goes away on its own. If it lasts longer than a month, however, it's worth asking your doctor about it.

It could be old blood from your kidneys or bladder or prostate. I wouldn't wait.