Unshaped stools floating on the water surface indicate that the patient suffers from gastroenteritis, ulcerative colitis, irritable bowel syndrome and other diseases. 1. Gastroenteritis: it is related to patients eating unclean and poorly digested food, and accompanied by abdominal pain, nausea, vomiting, dizziness and other discomforts, due to edema of the intestinal wall, accompanied by a large number of dilute stool discharge, there will be a stool that is not shaped and floating on the water surface. 2. Ulcerative colitis: mainly present mucus, pus and blood stools, stools are sometimes not shaped, due to the large amount of mucus contained in the stools, and easy to float on the water surface. 3. Irritable Bowel Syndrome (IBS): The patient’s bowel movements are often caused by emotional abnormalities, intestinal flora imbalance, etc., resulting in changes in the nature of the stools, which may be small in volume and unshaped, thus floating on the surface of the water. When this situation occurs, it is recommended to improve the routine stool examination as soon as possible to clarify the cause of the disease and treatment.