How do i deal with the severe abdominal pain caused by gas build-up in my digestive system on hemodialysis days?

Gas: Two suggestions: to help break down the gas bubbles, drink hot water and apply a hot water to the abdomen. These measures enable you to pass the gas downward easier for rectal expulsion. To prevent gas build up, avoid gas producing foods and take simethicone after meals and as needed at bedtime. Ask your nephrologist whether there is a relationship between dialysis and intestinal gas buildup.