Can to much drinking cause you to bleed?

I have a friend that is a very heavy drinker, when he drinks he bleeds from his rectal. he has had blood work done, and nothing was found. or:I have a

I have a friend that is a very heavy drinker, when he drinks he bleeds from his rectal. he has had blood work done, and nothing was found.

or:I have a friend that is a very heavy drinker, when he drinks he bleeds from his rectal. he has had blood work done, and nothing was found.

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