Which statement about the acute abdomen is true?

• A. The initial pain is typically well localized.
• B. The initial pain is vague and poorly localized.
• C. The initial pain is always severe at onset.
• D. The initial pain is unaffected by body position.

Answer: (B)

In an acute abdomen, the earliest pain usually comes from visceral nerves, which carry dull, poorly localized signals. This means the initial discomfort is often vague and felt in a broad area rather than in a precise spot. As inflammation and irritation progress and the parietal peritoneum becomes involved, somatic nerves take over, producing a sharp, well-localized pain over the affected region.

That’s why the correct statement is that the initial pain is vague and poorly localized. The other options don’t fit because well-localized pain at onset would imply early parietal peritoneum involvement, which is not typical initially; pain being always severe at onset isn’t consistent with many conditions where pain starts mild and worsens; and body position can influence abdominal pain as irritation, organ location, and peritoneal involvement interact with movement, so it’s not accurate to say the initial pain is unaffected by position.