Published by PMR of NY & CT
It's easy to think of weight-related health problems as something that happens decades from now. But some childhood obesity health risks can show up while a child is still in elementary or middle school, often with no obvious symptoms.
That's why regular checkups matter. Your child's pediatrician can look for early changes in blood pressure, blood sugar, the liver and sleep. Many of these problems can improve when they're caught early and the whole family builds healthier routines together.
Childhood obesity health risks doctors check for
Children with obesity are more likely than other kids to have certain health problems. A child might have one, several or none of them, which is why pediatricians screen rather than assume. The main concerns include:
- High blood pressure
- High cholesterol or triglycerides
- Prediabetes and type 2 diabetes
- Fatty liver disease
- Sleep apnea and asthma
- Bone, joint and foot problems
- Anxiety, depression and low self-esteem
The American Academy of Pediatrics advises checking blood pressure at every visit from age 3 for children with obesity. Depending on your child's age, the pediatrician may also order blood tests for cholesterol, blood sugar and liver health.
Heart and blood sugar changes
Extra weight can raise blood pressure and cholesterol in children, the same risk factors that strain the heart and blood vessels in adults. These changes usually cause no symptoms, so a blood pressure reading or blood test is the only way to know.
Type 2 diabetes in children and teens, once rare, is becoming more common. It usually begins with insulin resistance, when the body has trouble using insulin. One visible clue is dark, velvety skin on the back of the neck, in the armpits or in skin folds. Signs of high blood sugar include extreme thirst, frequent urination, unusual tiredness, blurry vision and weight loss without trying.
Liver, lungs and sleep
Fatty liver disease, now called metabolic dysfunction-associated steatotic liver disease (MASLD), is one of the most common liver conditions in children. Fat builds up in the liver, usually without symptoms, and it's often found on a routine blood test. Left unchecked, it can lead to inflammation and scarring.
Extra weight around the neck and chest can also narrow the airway during sleep, a condition called obstructive sleep apnea. Watch for loud snoring, gasping or pauses in breathing, and restless sleep. In children, poor sleep often shows up as trouble focusing or behavior changes rather than yawning. Children with obesity are also more likely to have asthma that is harder to control.
Bones, joints and growing bodies
A growing skeleton carries the extra load too. Children with a higher weight more often have knee, foot and back pain, which can make activity uncomfortable and harder to keep up. Two growth plate problems deserve special attention:
- Slipped capital femoral epiphysis (SCFE): the ball at the top of the thighbone slips at the growth plate, usually during the growth spurt around puberty. It can cause a limp or pain in the hip, groin, thigh or knee. Sometimes knee pain is the only symptom.
- Blount disease: a growth problem in the shinbone that makes the legs bow outward and can get worse over time.
Emotional health matters too
Not all childhood obesity health risks show up on a blood test. Children with a higher weight are more likely to be teased or bullied, and research links weight stigma with anxiety, depression, low self-esteem and unhealthy eating patterns.
Watch for signs such as not wanting to go to school, pulling away from friends, losing interest in favorite activities, or changes in sleep or appetite. The pediatrician can screen for depression and connect your child with a counselor. If your child talks about suicide or self-harm, call or text 988 (Suicide & Crisis Lifeline), or call 911.
When to get medical care
Call 911 or go to the emergency room if your child:
- Suddenly can't put weight on a leg after hip, thigh or knee pain
- Is vomiting, breathing fast, very drowsy or confused, especially after a stretch of extreme thirst
Call the pediatrician soon about:
- A new limp, or hip pain or knee pain lasting more than a few days
- Loud snoring with pauses in breathing
- Frequent headaches, especially with blurred or double vision
- More thirst and trips to the bathroom than usual
Frequently asked questions
How do doctors define obesity in children?
Doctors use body mass index (BMI) percentiles, which compare a child with others of the same age and sex. A BMI from the 85th up to the 95th percentile is considered overweight, and at or above the 95th percentile is considered obesity. BMI is a screening tool, not a full picture of health, so the pediatrician also looks at growth over time, family history and test results.
Can childhood obesity cause early puberty?
Research links a higher weight with earlier puberty, especially in girls, such as breast development or a first period at a younger age. In boys, the evidence is mixed. Early puberty can affect growth and emotional well-being, so tell the pediatrician if your daughter shows signs before age 8 or your son before age 9.
Is it safe for a child with a higher weight to play sports?
Yes, and for most kids it's one of the best things they can do. Start at a comfortable level, build up gradually and wear supportive shoes. Swimming and biking are easy on the joints. If pain lingers after activity, the pediatrician or a sports medicine provider can find the cause and help your child keep playing.
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