Chicken chest, also known as pigeon chest, is a deformity in which the sternum bulges forward and is shaped like the breast of a chicken or pigeon. The best time for correction of pigeon chest in children is usually considered to be from 3 to 12 years old. During infancy and early childhood, due to calcium deficiency, vitamin D deficiency, and lack of sunlight exposure, the affected child will develop a pigeon breast. In mild cases, it can usually resolve on its own with calcium, vitamin D supplementation and regular sun exposure. In more severe cases, the heart and lung function is affected by compression of the heart and lungs, and surgery is usually required. If the child is younger than 3 years old, there is a possibility of recurrence because the bone quality is soft; if the child is older than 12 years old, the child’s bone quality is hard and usually cannot achieve the purpose of correction, and may affect the child’s psychological health due to deformity and other reasons. It is recommended that children maintain a good posture with a straight back after correction and avoid holding heavy objects, including heavy school bags, to avoid affecting the effect of correction.