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Can lactose intolerance cause a alternation between diarrhea and constipation?

Yes, lactose intolerance can cause a fluctuation between diarrhea and constipation. It is more common to experience diarrhea with lactose intolerance, but it is possible to also have constipation after a bout of diarrhea. Keeping a food journal can help identify any correlations between what you eat and your symptoms. If symptoms persist despite dietary changes, it is recommended to consult a doctor for further evaluation.