Mixed IBS (IBS-M) might be the most common IBS subtype. It is defined as grester than 25% of stools being loose and watery and greater than 25% of stools being lumpy and hard when you are not taking laxatives or antidiarrheals. People with IBS-M report symptoms that are common in people who have IBS with constipation (IBS-C), such as straining, the feeling of having an incomplete bowel movement, and manual evacuation of the bowels. They also report urgency, which is more typical of IBS with diarrhea (IBS-D).