For ten days I have had loose to watery diarrhea and it has been a watery brown. I have tried eating rice, wheat toast or english muffins, saltines, soft eggs and yogurt and some plain chicken. Today, the 11th day my diarrhea was a green color. I have never had any severe diarrhea but once in a while slight diarrhea that lasted only a day or so. I just turned 67 and am female. What is this a possible symptom of? I have no fever, headache, abdominal pain, nausea or vomiting or chills. I do not feel ill at all. Before this began I was fine. I have not had any foods that made me ill either.