It is scary when a simple stomach ache or muscle cramp becomes a trip to the emergency room. Hemoperitoneum, a form of internal bleeding that flows into the peritoneal cavity or abdominal cavity, can cause this event. A person should seek immediate medical care if what they assumed was a stomach ache begins to worsen.


1. Dialysis

Both peritoneal dialysis and hemodialysis have their risks of accumulated blood in the belly. In the case of peritoneal dialysis, the lining of the peritoneum filters the blood, while a cleaning solution runs through the body. One study showed that some women of reproductive age who were receiving peritoneal dialysis developed recurrent mid-cycle episodes of hemoperitoneum. The causes ranged from ovulation to ruptured luteal or ovarian cysts. Another case demonstrated that the arteriovenous fistula (AVF) created by doctors to facilitate hemodialysis can weaken the vein wall, increasing the risk of an AVF aneurysm.

Hemodialysis arteriovenous fistula ovarian cysts victoriaashman / Getty Images


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