All the various causes of diarrhea alter colonic transit time making the intestinal contents travel faster through your colon so there is less time for reabsorption of all of those 9-10 liters. Obviously even a slight decrease in this transit time can result in a looser, wetter stool since the contents spend less time in the colon. There are a great variety of microbes, toxins, chemicals, and even foods that can decrease this intestinal transit time. Add to that the personal and individual variations in immune system functions causing food sensitivities or intolerances, stress, anxiety and other emotional reactions reactions and you can easily see that there may be many causes of diarrhea symptoms. PMS has also been associated with diarrhea.If you have the Symptoms of Premenstrual Syndrome (PMS)--Diarrhea, we would say herbal medicine is a safe and effective form of treatment. At TCM Window, we offer relaxing treatments and expert guidance through the whole process. We specialize in different kinds of chronic and difficult miscellaneous diseases, we offer the best possible care in a peaceful and welcoming environment. If you would want our expert to create a TCM diagnosis, please fill out the health form as requested.