Sorry, couldn't resist.
Diarrhea can have many causes, but generally speaking, unless you are suffering from amoebic dysentery, the herbs and foods that will help are the same. Foods are always the safest, gentlest way to treat bowel imbalances. Magic Rice Tea is great for vomiting/ diarrhea situations. Oatmeal and yogurt are excellent for any diarrhea, any cause. Coconut water is great for rehydrating during diarrhea.
The very best herb for diarrhea is blackberry root, taken as a tea or tincture. The tincture can be hard to find, and honestly since diarrhea is the only thing I would use blackberry root for off the top of my head, I rarely have any. Raspberry leaf actually makes a good substitute and I always have that, since it works well for such a host of things. If you prefer tea bags: Raspberry Leaf, Herbal Tea .
The main concern with any diarrhea is dehydration. Know the signs and call your doctor if you see them. And keep offering the coconut water and rice tea!
"God writes the gospel not in the Bible alone, but on trees and flowers and clouds and stars."
-Author unknown, commonly attributed to Martin Luther
*DISCLAIMER* The author of BreadwithHoney is neither a healthcare professional nor a certified herbalist. Information here is for educational purposes only. Use all home remedies at your own risk and always consult your healthcare provider.***