This is Dr. David
hard vomiting can often can cause bleeding and clots to come out.
prior history of heavy alcohol use can cause blood as well.
he should watch his stool to make sure they stay brown.
if his stools turn black, this is a sign his stomach is still bleeding and the blood is going through his bowels.
he should follow up with his doctor and get blood testing to check his stool for blood and to check his blood counts to see how much blood he may have lost.
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