关键词: 功能性便秘, 非潴留性大便失禁, 婴儿排便困难, 肠- 脑互动障碍, 罗马Ⅴ, 儿童, 聚乙二醇

Abstract: Functional constipation（FC）is one of the most common pediatric lower gastrointestinal disorders of gut-brain interaction（DGBI）.The RomeⅤcriteria reorganize pediatric lower gastrointestinal and biliary DGBI from an age-based framework toward a classification based on anatomical regions and symptom patterns. Under this framework，FC，functional nonretentive fecal incontinence（FNRFI），and infant dyschezia are addressed as defecation/anorectal disorders，while pediatric developmental context，toilet training，and caregiver-reported symptoms remain essential. Based on the RomeⅤlower and biliary child/adolescent article，the Rome Ⅴdiagnostic questionnaire article，corresponding Rome Ⅳ documents，and recent English-language guidelines and studies，this review summarizes the epidemiology，pathophysiology，diagnostic criteria，clinical evaluation，stepwise treatment， and refractory constipation management of pediatric FC. FNRFI and infant dyschezia are discussed as special-focus differential diagnoses. The goal is to support positive diagnosis，careful identification of alarm features，evidence-based treatment，and multidisciplinary care when needed.

Key words: functional constipation, functional nonretentive fecal incontinence, infant dyschezia, disorders of gut-brain interaction, Rome V, children, polyethylene glycol