Apples can be very useful when one has a bout of diarrhea*.
Take an apple**, remove the skin, seeds etc. and slice it. Put the sliced apples in 2 cups of water and boil. Drink this water when warm for quick relief.
* Note: Do see a medical professional when you have acute diarrhea.
** Use Organic apples whenever possible. Avoid apples that have a very shiny appearance as they may have a coating of wax made from petroleum. Buy locally grown apples whenever and wherever possible.