Why baby sleep & poop are the first clues to food intolerance

Your baby can't say "that didn't sit right with me." For the first couple of years, the clearest things they have to communicate with are how they sleep and what ends up in the nappy. Learn to read those two signals and you've got an early-warning system for food allergies and intolerances — often long before anything more obvious shows up.

Sleep is a symptom you can measure

An uncomfortable tummy doesn't wait politely for morning. Gas, reflux, cramping and the general unsettledness that can follow a food that doesn't agree tend to show up first as broken sleep:

• More night wakings than usual
• Restlessness, squirming, or pulling the legs up
• Being harder to settle than normal after a feed

One rough night means nothing on its own — every baby has them, for a hundred reasons. But restless nights that keep landing after the same ingredient are a clue worth keeping.

The nappy is a daily lab report

It isn't glamorous, but the nappy is one of the most honest readouts you'll get on how digestion is going. Changes that can accompany an intolerance include:

• Looser, more frequent, or unusually hard stools
• Mucus, or an abrupt change in colour or smell
• A sore, red bottom that keeps coming back

Some signs need a doctor, not an app. Blood in the stool, persistent vomiting, hives, swelling, or any difficulty breathing are red flags. Stop tracking and seek medical help straight away — these are not patterns to watch over time.

One reading is noise; the trend is the signal

Teething, a cold, a busy day, a growth spurt — plenty of things nudge sleep and poop around. That's exactly why a single observation can't be trusted, and exactly why writing it down matters. A score you can look back on turns a vague "I think last week was rough" into something you can actually see and compare.

A restless night and an off nappy after the same ingredient, three times in a month, is the kind of thing no one remembers — but a 1–5 score never forgets.

How to track it without adding work

The goal is enough history to reveal a pattern, not a graded report card for every meal. AllerLog keeps it to two taps after a feed:

• Sleep score (1–5): how well did they sleep afterward, from restless to deep?
• Poop score (1–5): how was the nappy, from abnormal to normal?

If you didn't notice anything, skip it — you can always edit later. Done consistently for a few weeks, those two quick scores quietly build the record that makes everything else possible.

From scores to suspects

Once the scores are in, they stop being a diary and start being evidence. AllerLog ties each sleep and poop score back to the ingredients in that meal, builds a chart for every ingredient, and lets its AI connect the symptoms back to specific foods. The two least appealing things to log turn out to be the two most important for finding what doesn't agree. You can even mark a suspect ingredient as an allergen and get a reminder the next time it appears on the menu.

AllerLog is a tracking and journaling tool to help you and your pediatrician spot patterns. It is not a medical device and does not provide a diagnosis. Blood in the stool, persistent vomiting, hives, swelling or any breathing difficulty require immediate medical attention. Always consult a qualified healthcare professional about your child's diet and health.