The first step is to replace the treatment with eugenol, or levothyroxine sodium tablets. In children with early onset of symptoms of hypothyroidism, it is important to determine the cause of the hypothyroidism. If some are caused by abnormal development of the thyroid gland itself, while others are caused by a developmental deficiency of the thyroid gland, which itself does not have a thyroid gland, in such cases thyroxine replacement therapy is administered for life. In addition, children with ectopic thyroid, whose symptoms appear relatively late, require a nuclear scan. The specific medication should be combined with clinical practice and guided by the doctor in an interview.