IBS is a functional bowel disorder that affects women more than men. The cause is unknown but it is believed to involve sensitivity of the colon to certain foods and stress. IBS cannot be transmitted between individuals as it is diagnosed based on symptoms alone and not due to any identifiable disease. Symptoms can range from mild to severe abdominal pain and constipation or diarrhea. Treatment focuses on symptom relief and may include dietary changes, medications, and stress management. While there is no cure for IBS, sufferers can find effective ways to manage their symptoms.