🩺 Written & Medically Reviewed by Dr. G
Board-Certified Pediatrician

Temper tantrums are common in toddlers and preschool-aged children, especially between about 1 and 4 years of age. They often happen because young children have strong emotions but are still developing the language, patience, impulse control, and emotional regulation skills needed to express those feelings appropriately.

Growth charts help pediatricians follow a child's height or length, weight, and other measurements over time.

A child at the 10th percentile can be perfectly healthy. So can a child at the 90th percentile.

Pediatricians are usually more interested in the pattern of growth across multiple visits than in one isolated percentile.

Children often establish a growth pattern influenced by genetics, nutrition, health, development, and other factors. A meaningful slowing of growth, unexpected weight loss, or significant changes in the growth pattern may deserve further evaluation.

If you're concerned about your child's height, weight, eating, or growth pattern, discuss it with your pediatrician rather than trying to interpret a single percentile on your own.

• Growth percentiles are not grades.
• The 50th percentile isn't the definition of healthy.
• Healthy children can naturally be smaller or larger than average.
• Growth trends over time usually provide more information than one measurement.
• Genetics strongly influence height and body size.
• Accurate measurements are important when interpreting growth.
• Babies and older children are evaluated somewhat differently.
• Pediatricians consider nutrition, development, family growth patterns, and overall health—not just numbers on a chart.
• Unexpected weight loss or significant slowing of growth deserves attention.
• Your child's growth chart should be interpreted in the context of the whole child.

Imagine two healthy five-year-olds standing next to each other.

One is among the tallest children in the class.

The other is among the shortest.

Does one of them have a growth problem?

Not necessarily.

Children aren't supposed to be identical in size.

Parents come in different heights and builds, and children inherit many of those characteristics.

That's why growth charts aren't designed to tell us whether a child is “big enough” or “tall enough.”

They help us answer a more meaningful question:

Is this child growing in a pattern that makes sense for this child?

That distinction is extremely important.

What is a growth chart?

A growth chart compares your child's measurements with measurements from other children of the same age and sex.

Depending on age, your pediatrician may track:

• weight
• length or height
• head circumference
• weight-for-length
• body mass index (BMI)

These measurements are plotted repeatedly as your child grows.

The result is not just a number.

It's a growth pattern.

What Does a Percentile Mean?

Suppose your child is at approximately the 25th percentile for height.

In simplified terms, that means your child is taller than roughly 25% of children in the reference population and shorter than roughly 75%.

It does not mean:

• your child is 25% as tall as they should be
• your child received a poor growth score
• your child needs to reach the 50th percentile
• something is automatically wrong

Likewise, being at a high percentile isn't automatically good or bad.

Percentiles describe relative size.

They don't independently diagnose health.

Why the Growth Curve Matters

One measurement gives us a snapshot.

Repeated measurements give us a story.

Imagine a child who has consistently grown near a lower height percentile while remaining healthy, developing normally, and following a similar trajectory year after year.

That may simply be that child's natural growth pattern.

Now imagine another child whose height or weight pattern changes substantially over time.

That change may be more informative than the percentile itself.

Pediatricians therefore look for:

trajectory, consistency, and growth velocity.

Babies and Young Children

Growth during infancy is especially rapid.

Your pediatrician will generally measure:

Weight

Infant weight is monitored closely because feeding, hydration, illness, and other factors can affect early growth.

Length

Babies are measured lying down until they are old enough for standing height measurements.

Head circumference

Head circumference provides additional information about early growth and development.

Weight-for-length

This helps pediatricians evaluate body proportionality during infancy and early toddlerhood.

For children under age 2, clinicians commonly use World Health Organization (WHO) growth standards.

For children age 2 and older, CDC growth charts are commonly used in the United States.

Many things influence how a child grows.

Genetics

Genetics plays a major role.

Tall parents often have taller children.

Shorter parents often have shorter children.

Family growth patterns also influence the timing of puberty and growth spurts.

Nutrition

Children need adequate calories, protein, vitamins, minerals, and overall nutritional variety to support healthy growth.

Prematurity

Children born prematurely may follow different early growth patterns, and corrected age may be considered during infancy and early childhood.

Chronic illness

Certain gastrointestinal, heart, lung, kidney, inflammatory, endocrine, genetic, and other medical conditions can affect growth.

Hormones

Growth hormone, thyroid hormone, and hormones involved in puberty all contribute to normal growth.

Feeding difficulties

Persistent difficulty eating or swallowing, extreme food restriction, or other feeding problems may affect nutritional intake.

Medications

Some medications can influence appetite or growth and may require monitoring.

Puberty timing

Children enter puberty at different ages.

A child who matures later than peers may temporarily appear shorter before experiencing a later growth spurt.

Talk with your pediatrician if you notice:

• unexpected weight loss
• poor weight gain
• noticeably slowed height growth
• clothing or shoe sizes remaining unchanged for an unusually long period
• persistent feeding difficulties
• frequent vomiting or diarrhea
• difficulty swallowing
• extreme dietary restriction
• persistent fatigue or weakness
• delayed or unusual pubertal development
• significant changes in appetite
• other symptoms occurring along with poor growth

Remember that many growth concerns are first identified through routine measurements before parents notice anything visually unusual.

That's one reason well-child visits are important.

1. Keep regular well-child appointments

Routine visits allow your pediatrician to compare measurements over time.

A single height measurement at home is much less informative than a documented growth trajectory.

2. Offer a balanced diet

Provide developmentally appropriate foods from a variety of food groups.

Aim for regular meals and snacks rather than making every bite a battle over calories.

3. Allow children to respond to hunger and fullness

For most healthy children, parents decide:

what foods are offered, when they're offered, and where meals occur.

Children gradually learn to respond to their own hunger and fullness signals.

4. Encourage regular physical activity

Movement supports overall health, strength, coordination, sleep, and well-being.

The goal isn't to manipulate a child's percentile.

It's to support healthy development.

5. Prioritize sleep

Sleep requirements vary with age, but adequate sleep is an important component of overall childhood health.

6. Know your family history

Tell your pediatrician if family members:

• are particularly short or tall
• had delayed puberty
• experienced unusual growth patterns
• have endocrine or genetic conditions affecting growth

Family context can be extremely helpful.

Don't treat the 50th percentile as the goal

There is nothing magical about the middle of the chart.

Half of healthy children will naturally be below it.

Don't put a young child on a restrictive diet without medical guidance

Children have nutritional needs that differ from adults.

If you're concerned about your child's weight, discuss it with your pediatrician before making significant dietary restrictions.

Don't pressure a child to eat simply to raise a percentile

Repeatedly forcing bites, bargaining over food, or turning meals into conflicts can create additional feeding problems.

Don't compare siblings

Two children in the same family can have very different growth patterns.

Don't obsess over home measurements

Small differences in technique can produce misleading results.

Growth is best evaluated using accurate measurements collected consistently over time.

Contact your pediatrician if:

• your child is losing weight unexpectedly
• your child isn't gaining weight as expected
• height growth appears to have slowed substantially
• your child's growth pattern changes significantly
• your child has persistent feeding difficulties
• eating has become extremely restrictive
• vomiting or diarrhea is persistent
• your child has difficulty swallowing
• your child appears unusually tired or weak
• you have concerns about delayed puberty
• growth concerns occur along with other symptoms
• you're worried about your child's growth for any reason

You don't need to interpret the chart yourself before asking.

That's part of what your pediatrician is there to help you do.

A low or high growth percentile by itself is not an emergency.

However, seek prompt medical attention when changes in weight or eating occur with signs of acute illness or dehydration, such as:

• inability to keep fluids down
• significantly decreased urination
• unusual lethargy or difficulty waking
• severe weakness
• persistent vomiting
• severe abdominal pain
• difficulty breathing
• signs of significant dehydration

The urgency depends on the child's overall condition, not simply their percentile.

• If your child's growth pattern raises concern, your pediatrician will first confirm that the measurements are accurate.

  Then they may review:

  • previous growth measurements
  • birth history
  • prematurity
  • feeding history
  • typical diet
  • appetite
  • gastrointestinal symptoms
  • medications
  • chronic medical conditions
  • developmental milestones
  • sleep
  • activity
  • family heights
  • family puberty patterns

• Your pediatrician may calculate or consider your child's expected height range based partly on parental height.

  A physical examination may look for clues to nutritional, endocrine, gastrointestinal, genetic, or other medical concerns.

  Depending on the situation, additional evaluation might include laboratory testing or referral to specialists such as:

  • a pediatric dietitian
  • pediatric gastroenterology
  • pediatric endocrinology
  • feeding specialists
  • other specialists based on the child's symptoms

• Most children won't need extensive testing.

  The evaluation depends on the growth pattern and the rest of the clinical picture.

Parents sometimes walk into my office worried because their child is at the 10th percentile.

I tell them something very important:

A percentile is not a grade.

I don't need every child to reach the 50th percentile.

What I want to see is a child who is growing appropriately for their body, their genetics, and their developmental stage.

A healthy child may naturally be small.

Another may naturally be tall.

The growth chart becomes most useful when we stop asking:

“What percentile is my child?”

and start asking:

“How is my child growing over time?”

That's the question your pediatrician is trying to answer at every well-child visit.

So don't chase a number.

Follow the curve—and look at the whole child.

— Dr. G

• American Academy of Pediatrics / HealthyChildren.org
• Centers for Disease Control and Prevention — Growth Charts
• World Health Organization — Child Growth Standards
• Centers for Disease Control and Prevention — Child and Teen BMI
• Your child's pediatrician

• Parents interested in this article may also find these guides helpful:

  Discipline Without Yelling: Setting Healthy Limits for Children

  When Your Child Won't Listen: Defiance, Power Struggles & Cooperation

  Sleep & Soothing

  Developmental Milestones

This article is intended for general educational purposes and does not replace individualized medical advice, diagnosis, nutritional guidance, or treatment. Children's growth patterns vary. Contact your child's pediatrician if you have concerns about your child's height, weight, nutrition, development, or overall health.