**Abdominal rigidity is a hard, board-like tightening of the belly wall that you cannot relax, and it almost always comes with severe pain, tenderness to light touch, and a strong urge to lie still.**
The tightening is involuntary, so it stays even when you take a slow breath and try to soften your stomach. It usually travels with other signs: constant pain that gets worse when you cough or move, nausea or vomiting, fever or chills, a swollen belly, no gas or stool passing, and fast shallow breathing. Some people feel a sharp jump in pain when someone presses on the belly and then quickly lets go. In older adults, people who are pregnant, and people taking steroids, the belly may feel less firm even when something serious is going on, so pain that is severe or steadily worsening still matters. Rigidity is a sign that the lining of the abdomen is irritated, and it needs emergency evaluation rather than watchful waiting at home.
The signs of a rigid abdomen
Common questions
What are the symptoms of Abdominal rigidity?
Abdominal rigidity means the muscles of your belly wall stay tight and firm even when you try to relax them. The belly often feels hard like a board, hurts when touched lightly, and hurts more when you cough, move, or when pressure is released quickly. Most people lie very still with their knees drawn up, since walking or bumps make it worse. It usually comes with severe constant pain, nausea or vomiting, fever or chills, bloating, no gas or stool passing, a fast heartbeat, and shallow breathing. Because rigidity points to irritation of the abdominal lining, call 911 or go to an emergency room right away.