Failure to thrive in childhood

Children grow at different rates, so clinicians assess a pattern rather than judging a child by appearance. Slower growth can reflect feeding difficulty, limited intake, frequent illness, vomiting, diarrhoea, trouble absorbing nutrients, or a condition that increases the body’s energy needs. Development, movement, sleep, appetite, and family growth patterns add context. A child can be active and well while still needing a review of measurements.

Arrange an appointment for a growth and feeding review. Bring the child’s health records and describe a usual day of meals, snacks, milk or formula, fluids, stools, and symptoms. Note coughing, gagging, long mealtimes, food avoidance, or tiring during feeds. Keep mealtimes calm and follow professional advice about portions or supplements. The plan may include feeding guidance, treatment for an underlying problem, and a scheduled growth check.

Seek urgent care if the child struggles to breathe, is difficult to wake, cannot keep fluids down, becomes very floppy, or has clear dehydration. Request prompt medical advice for repeated choking, persistent vomiting or diarrhoea, blood in stool, a sharp appetite change, or loss of previously gained skills.

Ask whether the growth pattern is changing, how feeding can be supported, whether development needs review, and which symptoms require same-day advice.