How do you know if your child is overweight?
  Doctors use the U.S. Centers for Disease Control and Prevention growth charts or the body mass index (BMI) to measure a child's weight compared to their height. 
 If you are concerned that your child is—or could become—overweight, talk about this with your child's doctor. The doctor may:
- Ask about how your child's diet and weight have changed over time. 
 - Ask if there is a family history of health problems. These may include obesity, type 2 diabetes, or heart disease. 
 - Give your child a physical exam. Your doctor will check your child's health and look for early signs of problems, such as type 2 diabetes. Your doctor also will look for emotional issues, such as depression, anxiety, or an eating disorder. 
 - Test your child for causes of weight gain. These may include blood tests to check your child's blood sugar level and to look for thyroid problems.