Poop Decoder · floating
Why does my poop float?
Usually gas. Usually harmless. Most floating poop has extra gas trapped in it, often after a change in what you eat. Floating on its own isn't a sign of illness, and it usually stops by itself.
Worry level Low
Usual cause extra gas
Not the usual cause fat
What usually causes it
Gas makes it float
A change in diet can mean more gas in the gut. More gas in the stool makes it lighter, so it floats.
A stomach bug can do it too
Gut infections can cause floating stools for a while. They usually settle once the infection passes.
Greasy, smelly and floating is different
Stool that floats and is also greasy and foul-smelling can mean your gut isn't absorbing nutrients properly, especially if you're losing weight. That needs a doctor.
Sources: MedlinePlus, Stools: floating.