The Child Who Will Not Eat, the Child Who Will Not Grow

Around the first birthday, a child starts pushing the bowl away. Before that, they ate whatever they were given. The person feeding them has not changed, and the food being prepared has not changed — only the child has.

Then one more worry attaches itself. Can they really grow well when they are eating like this?

The two worries always arrive together in a single sentence. But they are not the same question.

The Growth Rate Changes First

In the first year, a child's weight comes close to tripling from birth. And that pace drops sharply once the first birthday passes.

When the body needs less, it eats less. Appetite drops sharply after the first birthday. Pediatricians regard this as an ordinary part of this stage. With growth slowing down, there is no longer a reason to eat as much as before.

So around this age, the order needs to be flipped. Rather than eating less causing less growth, it is more that growth slows down first, and the amount eaten falls along with it.

Counted day by day, it looks even more inconsistent. Yesterday they finished a full bowl; today they will not eat even half. But add several days together, and it roughly evens out. This is invisible to someone counting meal by meal, and visible only to someone looking at a week at a time.

Height Does Not Grow at the Same Pace All Year

The growth rate also varies within a single year.

There is a study that measured school-age children's height in six-month halves. Of the height gained over a full year, more than 67 percent in boys and more than 60 percent in girls was concentrated in the half of the year that included summer. The rest fell in the half that included winter. This is not a comparison between different children — it holds true within the same year, for the same child.

So there is a reason parents say ‘they just aren’t growing lately’ more often in winter. You are, in fact, looking at the season when growth genuinely slows.

Measure and judge over a single month, and you end up judging the season rather than the child. Growth is something you can only see over a span of months.

Each Child's Own Curve Is the Standard

This is where the two worries split apart.

Saying a child is smaller than their peers is different from saying their own pace has slowed. A child's height and weight are plotted on a growth curve as a percentile. Even if a child sits on a lower line, if they keep climbing steadily along that line, that line is the standard for that child. Clinical guidelines see it the same way — a healthy child generally follows their own curve.

So what matters is not where the child is right now, but where they are heading. This especially applies to weight, when it crosses down several bands from the line it was following. When the curve bends that way, it needs to be looked at separately.

So not eating well and not growing well are not the same question. There are children whose intake varies day to day while their curve keeps tracking steadily.

When Not Eating Is a Result

That does not mean it is fine to simply leave a child who does not eat alone. Not eating while sick is different from not eating without being sick at all. What I am discussing here is the latter.

Hunger is not a sensation you can decide to feel. It is a signal that rises when the stomach empties. If emptying is slow, the signal does not rise even when mealtime comes. The child is not refusing to eat out of stubbornness — they simply are not hungry yet. I covered this path in not hungry when the stomach does not empty.

Sleep is tied into this too. A child who goes to bed late and barely gets up in the morning starts the day already running behind. Naturally, they are unlikely to say they are hungry at the breakfast table.

I ask how long after waking a child says they feel hungry. I do not try to boost the appetite first.

And how tall a child will ultimately grow is largely determined by genetics and metabolism. This is not a matter of intervening in that.

When It Is Not a Matter of Eating Habits

There are also children whose refusal to eat has a different cause behind it. When a child chokes or struggles while swallowing frequently. When chewing is difficult. When they seem to be in pain or cry unusually while eating. When they vomit repeatedly after eating.

In these cases, I do not move toward changing how the child is fed. I look separately at where, among swallowing, chewing, and passage down the throat, things are getting stuck.

I am especially careful with young children around their first birthday. At this age, frequent choking or vomiting after eating can sometimes stem from something entirely unrelated to eating habits. The same is true when weight fails to increase, or even falls.

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How much a child eats follows the pace at which they are currently growing. To parents watching a child who does not eat well, let me say this first: you are not feeding them wrong.

And whether they are growing well is a different question. Its answer is not in a single meal but in the curve.

Worrying about both at once blurs them both. Separate them, and the question you need to answer first narrows down to one.

Written by Dr. Heo Ji-young (PhD in Korean Medicine Pathology, Kyung Hee University · former Research Professor of Herbology, Kyung Hee University)