The common symptoms of IBS are abdominal pain or discomfort, diarrhea or constipation (sometimes both), bloating, gas, and distention of the abdomen. The abdominal pain with IBS is often a cramping type of pain. This pain could be in multiple different parts of the abdomen and move around. The diarrhea is typically unpredictable, as is the constipation. The unpredictability is one of the hallmarks of IBS that differentiates it from other conditions such as inflammatory bowel disease or Crohn’s disease, where diarrhea is very predictable. IBS symptoms are usually present during the day and not during sleep.