The causes of corpus cavernosum include congenital developmental abnormalities, malnutrition, precordial, rickets, etc. Children under 3 years old with rickets should be actively treated with anti-rickets treatment, including calcium and vitamin D supplementation, while children after 3 years old are mostly posterior, and treatment with calcium and vitamin D is ineffective. Generally, mild chicken chest will gradually disappear with physical growth, and strengthening physical exercises, such as chest expansion, push-ups, head lifting and other exercises, two to three times a day, can accelerate the correction of deformity. If the chicken chest is serious and affects the respiratory circulation, surgery is needed. Rickets caused by rickets is a long-term vitamin D deficiency caused by skeletal changes, need to do bone alkaline phosphatase test to confirm the diagnosis.