Having trouble on the toilet? No shame—it’s pretty normal. About 15 percent of Americans live with chronic constipation. It’s particularly common in kids: As much as 30 percent of them ...

Popularized by brands like Squatty Potty, toilet stools help people have bowel movements without discomfort or strain, according to Dr. Aditya Ashok, a gastroenterologist at Weill Cornell Medicine.