I have had diarrhea and i just found a black pea like ball in my stool. i squeezed it and it felt like i was squeezing something plastic, this black 'goo' like substance came out. what is the cause of this? is it lack of fiber?

Diarrhea/stool mass: That ‘pea’ was likely some collection of your body’s own digestive enzymes or other natural secretions and is likely not harmful but indicates an underlying problem. Chronic diarrhea can be caused by Irritable Bowel Syndrome, diet, supplements or medications, immune system problems or many others. It is important for you to discuss this with a physician to find and treat the cause.