Actor Mumtaz has been hospitalized due to irritable bowel syndrome. 1947-born Mumtaz Askari Madhvani was Bollywood's highest-paid actress during the 1906s and 1970s. Irritable Bowel Syndrome Irritable Bowel Syndrome or IBS is a disorder of the large intestine. It is also known as spastic colon, irritable colon, mucous colitis, and spastic colitis. On the severity of the disease, many experts say that only a small number of people with IBS have severe signs and symptoms. Even then this disorder impacts the daily life of an individual to a large extent.