Symptoms of Lactose Intolerance


General information about symptoms of Lactose Intolerance: The symptom information on this page attempts to provide a list of some possible symptoms of Lactose Intolerance. This symptom information has been gathered from various sources, may not be fully accurate, and may not be the full list of symptoms of Lactose Intolerance. Furthermore, symptoms of Lactose Intolerance may vary on an individual basis for each patient. Only your doctor can provide adequate diagnosis of symptoms and whether they are indeed symptoms of Lactose Intolerance.

List of symptoms of Lactose Intolerance: The list of symptoms mentioned in various sources for Lactose Intolerance includes:

Symptoms of Lactose Intolerance: Common symptoms include nausea, cramps, bloating, gas, and diarrhea, which begin about 30 minutes to 2 hours after eating or drinking foods containing lactose. The severity of symptoms varies depending on the amount of lactose each individual can tolerate. 1

You may also have

  • Gas.
  • Diarrhea.
  • Swelling in your stomach.

Even though lactose intolerance is not a dangerous health condition, the symptoms can be very uncomfortable. Gas, bloating, stomach cramps, diarrhea, and nausea are the most common symptoms. These symptoms may begin within as little as 30 minutes or up to two hours after eating or drinking foods that contain lactose. The severity of symptoms is different for each person, and depends on how much lactose a person can tolerate. Recent studies have found that many people who have lactose intolerance can have one serving of milk with a meal or two servings of milk per day, at separate times, without experiencing symptoms. People also may be able to tolerate food like aged cheese, which has less lactose, or yogurt, which has bacteria that digests lactose.3

More symptoms of Lactose Intolerance: In addition to the above information, to get a full picture of the possible symptoms of this condition and its related conditions, it may be necessary to examine symptoms that may be caused by complications of Lactose Intolerance, underlying causes of Lactose Intolerance, associated conditions for Lactose Intolerance, risk factors for Lactose Intolerance, or other related conditions.

Medical articles on symptoms: These general reference articles may be of interest:

1. excerpt from Lactose Intolerance: NIDDK
2. excerpt from Why Does Milk Bother Me: NIDDK
3. excerpt from Lactose Intolerance: NWHIC

Last revision: May 30, 2003

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