Diarrhea, with its urgent, loose, or watery stools, can be unpleasant and worrisome at any time of day. Nocturnal diarrhea occurs when you experience diarrhea at night, with symptoms that awaken you ...

Osmotic diarrhea is when undigested material reduces how much water and electrolytes the bowels can absorb. It can occur when a person’s body has difficulty digesting certain foods, such as lactose.

PARIS — Most diarrhea that leads patients to seek medical advice is actually a false alarm, said gastroenterologist Nassim Hammoudi, MD, PhD, of the Lariboisière Hospital in Paris, during France's ...