Rebuilding Your Digestive System’s Natural Daily Clock

A kitchen windowsill in bright daylight, with wooden utensils in a cup, a potted lavender plant in a tin pot on the sill, and a clip-top glass jar beside it.

When to stop and get medical care. Some symptoms need a doctor, not a routine. Contact a medical provider promptly if you have severe abdominal pain; fever or persistent vomiting; rectal bleeding or black, tarry stool; unexplained weight loss; a new, unexplained change in bowel habits, especially from age 45 onward; or recent abdominal surgery […]