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Symptoms of Lactose Intolerance

Symptoms of Lactose Intolerance: Introduction

Symptoms of lactose intolerance can be mild to severe and vary between individuals. Each person with lactose intolerance can have different tolerances for lactose. Symptom severity can differ based on such elements as how much of the enzyme lactase a body produces and the amount of food or beverages that contain lactose that have been consumed.

Symptoms of lactose intolerance generally develop about 30 minutes to two hours after consuming foods or beverages that contain lactose. Common foods and beverages that contain lactose include milk, ice cream, soft cheeses, yogurt, sour cream and any food that is made with dairy products.

Symptoms often include nausea. Nausea may be described as feelings of wooziness, queasiness, retching, sea-sickness, car-sickness, an upset stomach, and feeling green around the gills. Other symptoms of lactose intolerance can include diarrhea, bloating, cramping, and gas.

Complications of lactose intolerance include dehydration if diarrhea is severe and persistent. This is especially a risk for infants born with lactose intolerance who generally have persistent and severe diarrhea. These infants are also at risk for not gaining weight. This is rare because symptoms of lactose intolerance generally do not develop until after age two....more about Lactose Intolerance »

Symptoms of Lactose Intolerance

The list of signs and symptoms mentioned in various sources for Lactose Intolerance includes the 7 symptoms listed below:

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Lactose Intolerance: Symptom Checkers

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Lactose Intolerance: Symptom Assessment Questionnaires

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Lactose Intolerance: Complications

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Diagnostic Testing

Diagnostic testing of medical conditions related to Lactose Intolerance:

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Do I have Lactose Intolerance?

Lactose Intolerance: Undiagnosed Conditions

Diseases that may be commonly undiagnosed in related medical areas:

Home Diagnostic Testing

Home medical tests related to Lactose Intolerance:

Wrongly Diagnosed with Lactose Intolerance?

The list of other diseases or medical conditions that may be on the differential diagnosis list of alternative diagnoses for Lactose Intolerance includes:

Lactose Intolerance: Research Doctors & Specialists

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More about symptoms of Lactose Intolerance:

More information about symptoms of Lactose Intolerance and related conditions:

Other Possible Causes of these Symptoms

Click on any of the symptoms below to see a full list of other causes including diseases, medical conditions, toxins, drug interactions, or drug side effect causes of that symptom.

Article Excerpts About Symptoms of Lactose Intolerance:

Lactose Intolerance: NIDDK (Excerpt)

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. (Source: excerpt from Lactose Intolerance: NIDDK)

Why Does Milk Bother Me: NIDDK (Excerpt)

You may also have

  • Gas.
  • Diarrhea.
  • Swelling in your stomach.
(Source: excerpt from Why Does Milk Bother Me: NIDDK)

Lactose Intolerance: NWHIC (Excerpt)

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. (Source: excerpt from Lactose Intolerance: NWHIC)

Lactose Intolerance as a Cause of Symptoms or Medical Conditions

When considering symptoms of Lactose Intolerance, it is also important to consider Lactose Intolerance as a possible cause of other medical conditions. The Disease Database lists the following medical conditions that Lactose Intolerance may cause:

- (Source - Diseases Database)

Lactose Intolerance as a symptom:

For a more detailed analysis of Lactose Intolerance as a symptom, including causes, drug side effect causes, and drug interaction causes, please see our Symptom Center information for Lactose Intolerance.

Medical articles and books on symptoms:

These general reference articles may be of interest in relation to medical signs and symptoms of disease in general:

About signs and symptoms of Lactose Intolerance:

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


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