When to Worry About Your Child's Weight

Normal Growth

• Children have different body types and grow at different rates, so there isn't a single weight that's right for all kids of a certain age or height, according to KidsHealth.org. Children often gain weight and get taller as they go through puberty, which can begin as early as age 8. If you're not sure whether your child's weight is normal or healthy, ask her doctor. Never put kids on a diet without consulting a doctor -- even kids who do have a weight problem need calories and nutrients to grow and develop properly, according to the New York Department of Health.

Observing Your Child

• You can also observe your child's eating habits and physical activity, according to FamilyDoctor.org. Children who gain weight while eating a healthy diet and exercising regularly may be preparing for a growth spurt. However, if your child appears to feel bad about her weight or body, or if you are concerned with your child's diet or level of physical activity, make an appointment with her doctor.

Talking to a Doctor

• Talking to your child's doctor can help you determine whether you should be concerned about your his weight. However, since many children and adolescents feel self-conscious about their weight, ensure your child doesn't feel uncomfortable or attacked. If you are uncomfortable bringing up your child's weight in his presence, ask to speak to the doctor over the phone or in a different room, recommends the American Heart Association. You can also discuss the importance of healthy eating or physical activity in the week before the appointment so that kids are prepared to receive advice from the doctor.

BMI Calculations

• Your doctor may calculate your child's body mass index to help determine whether he has a weight problem. The formula for BMI uses your child's height and weight to estimate how much body fat he has. In general, a weight above the 5th percentile and below the 85th percentile is considered healthy. You can also calculate your child's BMI. However, BMI formulas aren't exact -- they don't account for how large a child's body frame is, for example -- so your doctor will use BMI along with other information to evaluate your child's weight.

Healthy Habits

• Whether or not your child has a weight problem, developing healthy habits can help her grow properly and stay healthy. Try to build healthy habits as a family rather than targeting a child who might be overweight, according to FamilyDoctor.org. Keep plenty of healthy food and snacks in the house, such as fresh fruits and vegetables, and limit fast food and junk food. Serve low-fat milk or water with meals rather than sugary drinks. In addition, reduce the time your family spends in front of the TV and encourage your child to participate in physical activity she enjoys.