Funnel chest is not the same as rickets. Funnel chest is a congenital and familial disease. A mild case of funnel chest can be asymptomatic, while a moderate to severe case of funnel chest is harmful to the body mainly because the lower middle part of the sternum and the adjacent rib cartilage are depressed underneath, making the distance between the sternum and the spine greatly reduced, thus compressing the heart behind the sternum and the lungs on both sides, affecting respiratory and circulatory functions, reducing lung capacity, increasing functional residual air volume, and activity tolerance The lung volume decreases, functional residual air volume increases, and activity tolerance decreases. Young children often have recurrent respiratory infections with cough and fever and are often diagnosed with bronchitis or bronchial wheeze. Circulatory symptoms are less frequent in young children, but older ones may present with dyspnea, rapid pulse, palpitations, and even pain in the precordial region after activity, mainly because the heart is compressed, cardiac blood output cannot meet the needs during exercise, and the myocardium is hypoxic, thus causing pain. Some patients can also develop arrhythmias, as well as systolic murmurs. Surgical treatment is the only option to cure moderate to severe funnel chest. Rickets is a common pediatric disease caused by vitamin D deficiency that affects calcium and phosphorus metabolism in the body. Rickets mainly affects skeletal growth, early irritability, nocturnal crying, excessive sweating, easy to be frightened and hair thinning, most of the bald circle can be seen behind the occipital area, typical manifestations are mainly skeletal changes, mainly fontanelle still does not close at the age of 1, delayed teething, ribs can be seen “beads”, chicken chest, funnel chest, and even “X “X” shaped legs or “O” shaped legs, serious cases can cause convulsions and other symptoms. Insufficient sunlight exposure, as well as suffering from digestive tract and liver and kidney diseases are also the causes of rickets. Preventive health care measures are: vitamin D supplementation, calcium supplementation, active treatment of diarrhea and liver and kidney diseases; while doing a good job of breastfeeding, timely addition of complementary foods, infants should be more sun exposure, if necessary, can feed cod liver oil preparations, but long-term cod liver oil should be taken to prevent vitamin A poisoning.