Infant thinness may be related to feeding practices, and normal development can be achieved by increasing nutrients and ensuring quality sleep. In addition, it is also necessary to be alert to the disease caused by the baby thin. Infant feeding is mainly based on dairy food, to ensure that the amount of milk intake every day, add complementary food on time, supplement a variety of vitamins and trace elements, to ensure that the growth and development of infants need nutrients. In addition to feeding the need to pay attention to nutritional balance, avoid excessive intake of a single type of food or not intake of a nutrient-rich food. Ensure the quality of your child’s sleep on a daily basis, as growth can only be achieved with adequate sleep. Avoid going to bed too late or sleeping for a short period of time, which is not conducive to the baby’s growth. In addition, pay close attention to your baby’s health. Any abnormalities, such as gastrointestinal disorders, hypothyroidism, etc., may also lead to malnutrition and thinness. If any of the above conditions occur, it is recommended to seek prompt medical attention and follow the doctor’s instructions for symptomatic intervention.