The hand is usually not pronated, and pronation is a congenital developmental abnormality, such as congenital clubfoot in the fetus. Normal human posture usually requires a group of several muscles to antagonize and maintain balance. During pediatric development, abnormal development of the muscles, tendons, and ligaments of the foot can lead to inversion of the foot due to excessive tension in the medial tendons. It is also possible that the fetus is compressed in the womb and the forefoot is forced inward, resulting in the manifestation of foot entropion after birth, which is usually visible after birth and generally requires correction of foot entropion deformity at a few months to avoid affecting growth and development. For congenital clubfoot, a cast should be applied to the bones, muscles and tendons of the foot for correction, and surgery is generally not required, and treatment is best when the fetus is a few months old; the later the treatment, the greater the impact on the child’s growth and development.