In recent years, hypothyroidism is a disease that is more likely to occur in newborns. It has a great impact on the normal development of the child and needs to be taken very seriously. Hypothyroidism, or low thyroid function, is an endocrine disease that affects the body’s metabolism. The main symptoms include the child refusing to eat, loss of appetite, delayed brain development, and even the cessation of bone development. The treatment of hypothyroidism is a long-term process. The child needs continuous thyroid hormone preparations to ensure normal development of the body. In addition to this, regular follow-up examinations are needed to check for signs of improvement. Checkups are performed one year after stopping the medication and if signs of deterioration are found, lifelong medication may be required. In terms of daily life, it is advisable to give your child more iodine-rich foods, such as using iodized salt for cooking. Next, consume more protein-rich foods, such as eggs and meat. It is also important to take vitamin supplements and eat more fruits such as apples and pears. Calcium supplementation, too, is very important, and a glass of pure milk is recommended every morning. In conclusion, this type of condition is complicated and requires a longer period of treatment.