Clinically, there is no such thing as galactose intolerance, but lactose intolerance refers to diarrhea, bloating, nausea, and vomiting due to the lack of the enzyme lactase, which prevents lactose from being broken down and absorbed in the intestinal tract. Lactose intolerance is usually seen in breastfed and cow’s milk-fed newborns and infants. Lactose that cannot be digested and broken down is fermented into lactic acid, methane and carbon dioxide under the action of colonic flora, stimulating the intestinal wall and causing increased intestinal peristalsis, leading to diarrhea, bloating, nausea, vomiting and other symptoms, and carbon dioxide accumulates in the intestines, which can lead to flatulence or even cause intestinal spasms and intestinal colic. If you have lactose intolerance, you should consult a doctor for a comprehensive analysis of the specific situation, make a clear diagnosis and standardize the treatment under the guidance of a professional physician.