Diarrhea serves the digestive system by helping to clean out intruders. It's when the body detects a certain kind of species invasion of the intestinal track or toxic food that the water content of the stomach increases dramatically on occasion. This adds more moisture to feces and it soon finds its way out the heinous in a more liquid like form. Once clear of obstructions and invading species, the diarrhea stops.
Some types of medicine will help the condition, but sometimes it's better to just let the diarrhea run its course. The biggest danger of diarrhea arises from water loss, dehydration. This is the primary reason that when entering a hospital nurses and nurses assistance ensure that a bottle water dangles above our heads. From this water we receive additional fluids to ensure dehydration does not occur.
It's the: that helps reclaim water as it flushes itself out. So degrees of dehydration become impediments to the colons flushing. Most often the biggest threat from dehydration is easily countered with rehydration. Most often once rehydration occurs, the biggest threat becomes pain, inconvenience, and embarrassment. It's interesting how these conditions increase as we reach old age.
Feces cleanup sometimes involves hours of labor when someone walks around with diarrehea.
Then there is the opposite condition in which constipation occurs. Our peristaltic muscles do additional work in the upper