儿童乳糖不耐受症是乳糖酶缺乏或活性低下导致儿童进食乳糖后出现腹痛、腹胀、腹泻等胃肠症状的临床综合征,可通过病史资料和去乳糖饮食初步诊断,实验室常用氢气呼气试验、大便还原糖测定和尿半乳糖检测确诊。主要治疗采用去乳糖饮食疗法辅以益生菌,继发性乳糖不耐受同时纠正原发病和并发症。 Children lactose intolerance is the clinical syndrome of gastrointestinal symptoms such as abdominal pain, abdominal distension and diarrhea caused by lack of lactase or low activity of children after lactation, which can be diagnosed by history data and initial diagnosis of lactose diet. Hydrogen expiration Test, stool reducing sugar determination and urine galactose test confirmed. The main treatment with lactose diet supplemented by probiotics, secondary lactose intolerance while correcting the primary disease and complications.