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

When to see a doctor

Make an appointment with your doctor if you frequently have symptoms of lactose intolerance after eating dairy foods, particularly if you're worried about getting enough calcium.

April 14, 2015

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