What should you know about minor lactose intolerance?

Lactose is a natural sugar in milk. The small intestine uses lactase to digest it; when lactase is limited, undigested lactose reaches the large intestine, where bacteria break it down and produce gas. This can lead to bloating, cramps, rumbling, and diarrhoea after dairy.

Symptoms vary with the food, portion, and individual. Lactose intolerance is different from a milk allergy, which can involve hives, swelling, wheezing, or a severe reaction. Blood in stool, weight loss, persistent vomiting, or symptoms unrelated to dairy need assessment rather than simple food restriction.

Keep a food and symptom diary, noting the type and amount of dairy and when symptoms begin. Try smaller portions with meals, or choose lactose-free alternatives, while checking labels for hidden milk ingredients. Avoid cutting out all dairy for a long period without a plan for calcium, vitamin D, protein, and overall energy.

A pharmacist or clinician can discuss lactase products and whether they fit your situation. Nutrition Counselling can help you replace dairy without an unnecessarily restrictive diet. Food Intolerance Testing may be considered when the history is unclear, but results need interpretation alongside symptoms.

Seek urgent help for wheezing, throat tightness, facial swelling, faintness, or widespread hives after milk; these symptoms suggest an allergic reaction rather than simple intolerance. Arrange a medical review for blood in stool, ongoing diarrhoea, weight loss, severe pain, fever, or symptoms that persist despite avoiding suspected triggers.

Children, pregnancy, and people with a restricted diet may need tailored nutrition advice. An assessment can also check for other causes of abdominal pain, bloating, or diarrhoea when the pattern is inconsistent.

Ask whether your pattern fits lactose intolerance, how to test a food change safely, which alternatives provide needed nutrients, and whether another digestive condition should be considered.