The signs and symptoms of lactose intolerance usually begin 30 minutes to two hours after eating or drinking foods that contain lactose. Common signs and symptoms include:

  • Diarrhea
  • Nausea, and sometimes, vomiting
  • Abdominal cramps
  • Bloating
  • Gas

Symptoms are usually mild, but may sometimes be severe.

When to see a doctor

Make an appointment with your doctor if you or your child has any signs or symptoms that worry you.

Apr. 04, 2012