Had black stools for three days after eating pig blood once

Eating pig blood once and then having black stools for three consecutive days may be caused by physiological factors, or it could result from pathological conditions such as gastric ulcers or duodenal ulcers. It is recommended to identify the underlying cause and receive appropriate treatment.

I. Physiological Factors

Black stools may occur after consuming a large amount of pig blood in one sitting. The iron in hemoglobin from the pig blood may not be fully absorbed and, under the action of gastric acid and intestinal bacteria, can combine with sulfides to form ferrous sulfide. This is a normal physiological phenomenon and does not require special treatment.

II. Pathological Factors

1. Gastric Ulcer

Gastric ulcers may result from frequent consumption of spicy or irritating foods or infection with *Helicobacter pylori*. When the ulcer is deep, it can damage blood vessels beneath the mucosal layer, leading to bleeding. Under medical guidance, treatment may include gastric mucosal protectants such as potassium citrate bismuth capsules, hydrotalcite chewable tablets, or colloidal bismuth pectin capsules, which help promote tissue repair and ulcer healing.

2. Duodenal Ulcer

Duodenal ulcers may lead to excessive gastric acid secretion, which irritates blood vessels beneath the duodenal mucosa and causes them to rupture. Treatment should follow medical advice and often includes proton pump inhibitors (PPIs). Commonly used medications include rabeprazole sodium enteric-coated tablets, pantoprazole sodium enteric-coated tablets, and lansoprazole enteric-coated tablets, which suppress gastric acid secretion and reduce irritation to the digestive tract.

In addition, conditions such as stomach cancer may also cause similar symptoms. It is recommended to determine the exact cause and undergo standardized treatment accordingly.