The height and weight of 5-year-old boys are not up to standard may be caused by malnutrition, growth hormone deficiency, thyroid hormone deficiency and so on, and the treatment should be chosen according to different causes. At present, the commonly used methods include dietary adjustments, moderate exercise, medication and so on. 1. Malnutrition: Adequate nutrition is necessary to ensure the normal growth and development of children, if children are chronically undernourished or eat a single nutrient, it will result in delayed development and substandard height and weight. Therefore, we need to ensure that the intake of nutrition is sufficient and complete, but also need to moderate exercise to help digestion and absorption, so as to promote the height and weight tend to normal. 2. Growth hormone deficiency: If your child’s height and weight are not up to standard due to growth hormone deficiency, you need to go to the hospital for a complete examination and supplement growth hormone according to the doctor’s instructions to promote development. 3. Thyroxine deficiency: Insufficient thyroid hormone in childhood can lead to slower growth and development, or even dwarfism. At this time, it is necessary to use levothyroxine to maintain the level of thyroid hormone to ensure the normal development of children. There are other reasons why a 5-year-old boy’s height and weight may not meet the standard, so it is recommended to consult a doctor in time to clarify the cause of the disease and then follow the doctor’s instructions for treatment.