Constipation causes abdominal pain because it slows the stool movement through the intestines, increasing abdominal pressure.
The pain may feel crampy or sharp.
It typically occurs in the lower abdomen, though it may radiate to the back.

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This article reviews symptoms of abdominal pain from constipation, possible causes, relief, and prevention.
Sensation
Abdominal pain from constipation may feel like a sharp twinge or cramps.
You may also experience fullness, bloating, a feeling of not fully emptying your bowels, and nausea.
Location
Many people feel constipation symptoms in the right or left lower abdomen.
Frequency
Pain from constipation lasting less than one week (acute) may be intense and sudden.
Constipation that lasts more than three months (chronic) may cause persistent discomfort.
Infrequent or difficult bowel movements can contribute to the recurrent nature of the pain.
What Causes Abdominal Pain and Constipation?
Constipation causes an accumulation of stool in the intestines.
The pressure, swelling, and gas can stimulate pain receptors, leading to abdominal pain.
It helps regulatenervous system-controlled functions like breathing, heart rate, digestion, and bowel movements.
Additionally,pelvic floor therapyhelps strengthen or relax pelvic floor muscles that may contribute to constipation.
Over-reliance can disrupt bowel function or lead to side effects like dehydration.
However, if you experience persistent or severe constipation or abdominal pain, seek medical evaluation.
Bharucha AE, Lacy BE.Mechanisms, evaluation, and management of chronic constipation.Gastroenterology.
2020;158(5):1232-1249.e3.
2020;115(2):294-301. doi:10.14309/ajg.0000000000000502
Cancer Research UK.Fecal impaction.
2019;9(8).