A bowel movement that sinks is normal, according to Healthline. Floating bowel movements are not a disease or illness, but they can be a symptom of some diseases and illnesses. Poor absorption of nutrients and excess gas are the most common causes of floating stools.Continue Reading
Floating stools occur most of the time because of what a person eats, as Healthline indicates. A change in diet may cause increased gas, which allows the stool to float. Bowel movements may also float due to a gastrointestinal infection. Greasy, foul-smelling floating stools may be due to severe malabsorption of nutrients, especially when losing weight.
If a person's stools or bowel movements change, he should tell a doctor. A health care professional should be contacted immediately if bloody stools develop with weight loss, dizziness and fever, according to MedlinePlus.Learn more about Pain & Symptoms