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:
- Nausea, and sometimes, vomiting
- Abdominal cramps
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
- Montgomery RK, et al. Lactose intolerance. http://www.uptodate.com/index. Accessed Jan. 29, 2012.
- Lactose intolerance. National Digestive Diseases Information Clearinghouse. http://digestive.niddk.nih.gov/ddiseases/pubs/lactoseintolerance/. Accessed Jan. 29, 2012.
- Siddiqui Z. Selected disorders of malabsorption. Primary Care: Clinics Office Practice. 2011;38:395.
- Marchiondo K. Lactose intolerance: A nursing perspective. Medsurg Nursing. 2009;18:9.
- 5. Lactose intolerance and health. Rockville, Md.: Agency for Healthcare Research and Quality. http://www.ahrq.gov/clinic/tp/lactinttp.htm. Accessed Jan. 29, 2012.
- Shaukat A, et al. Systematic review: Effective management strategies for lactose intolerance. Annals of Internal Medicine. 2010;152:797.
- Picco MF (expert opinion). Mayo Clinic, Jacksonville, Fla. Feb. 6, 2012.