For children younger than 5, tummy aches are a common concern. The most common cause is constipation, but gas, reflux, GERD, colic, stomach flu, upper respiratory infections, motion sickness, food allergies, lactose sensitivity, intestinal blockage (obstruction), food allergies, other infections, and appendicitis are other culprits.Make sure that you choose the right waistband to combat baby tummy ache.
Why is my infant or toddler suffering from abdominal pain?
Below, common and rare causes of abdominal pain are covered in detail, ranging from gas to appendicitis. In order to find out what causes your child's tummy problem, it can take some detective work with the doctor, particularly if symptoms come and go. Pay attention to whether your child seems uncomfortable (such as immediately after a feeding) and what other symptoms she has such as fever, vomiting or diarrhoea, for clues.

When am I going to contact the doctor?
If your child has a stomach ache, call the doctor:
Has pain that persists for more than three consecutive days several times a day,
Has stomach pain that is worsening
Some signs, such as vomiting, diarrhoea, or fever, are present.
Losing weight from her stomach ache
You know the most about your kids. If there is a stomach ache in your child and you're worried that something more sinister is going on, call your doctor.
For instance, due to bubbles in milk, a bad latch when breastfeeding, or gasping between cries, gas forms when babies swallow air. When infants start solids and try new foods for the first time, a gassy tummy is normal. Gas, particularly in the first three months, may be a sign of intestinal immaturity: the colonies of bacteria in the digestive tract of a baby (the 'gut microbiome') are still growing. And it is crucial to comprehend how to calm a baby down quicky.