Why Does My Baby Need an Abdominal Ultrasound? Common Reasons Explained

Persistent Or Forceful Vomiting In Babies

Vomiting has many causes, but persistent or forceful vomiting needs medical assessment rather than waiting for a routine scan. Your doctor may request an ultrasound to look for a structural problem such as pyloric stenosis, a narrowing at the outlet of the stomach that usually appears in the first few months of life. Ultrasound is usually the first imaging test for it.

Ongoing Or Localised Tummy Pain

Children have tummy pain for many reasons. If the pain lasts, stays in one area, or comes with other concerning symptoms, an ultrasound can help examine the structures nearby. It can show some abnormalities, but not every cause is visible, so your doctor will read the result alongside your child’s symptoms and examination.

Abdominal Swelling Or A Lump

If you notice unusual swelling, or a doctor feels a lump during an examination, an ultrasound can show where it is, how big it is, and what it looks like. This can help distinguish a fluid-filled cyst from a solid mass. A lump should always be assessed by a doctor, who will decide what further investigation is needed.

Jaundice Or Abnormal Liver Blood Tests

Jaundice causes yellowing of the skin or the whites of the eyes. If a doctor suspects a problem with the liver, gallbladder, or bile ducts, an ultrasound can examine these structures. Blood tests and your child’s history matter too, because ultrasound cannot identify every cause. Jaundice in a newborn or young infant should be assessed promptly by a healthcare professional.

Persistent Unexplained Fever

If a child has a persistent fever and your doctor suspects an abdominal source of infection or inflammation, they may request an ultrasound. Fever alone does not mean a scan is needed. Your doctor will consider the overall clinical picture before deciding whether an ultrasound is appropriate.

How the Scan Works

Paediatric ultrasounds are generally well-tolerated and considered a safe and comfortable scan for kids. During the procedure, the sonographer will position your child, apply gel to their tummy, and move a handheld probe across the skin to capture images. Your child may need to change position or stay still briefly. A kids’ ultrasound is non-invasive and generally well tolerated, although the pressure may feel uncomfortable if your child’s tummy is tender. At Insight Diagnostic Imaging, you can stay with your child during the scan, and bringing a favourite toy or comfort item may help them feel more settled. A child-friendly approach and calm explanation of what’s happening may help your child feel more settled during the scan.

What an Abdominal Ultrasound Can and Can’t Show

An abdominal ultrasound can help doctors investigate a specific concern, but it cannot detect every condition or always explain your child’s symptoms. Sometimes, the scan provides useful information without giving a definite answer. Your doctor will interpret the findings alongside your child’s medical history, examination, and any other tests, and tell you if further investigations or follow-up is needed.

How Should You Prepare Your Child?

Knowing what to expect during a paediatric ultrasound can help you prepare accordingly. Before the appointment, check whether your child’s scan requires fasting or any other preparation. When you book an ultrasound with us, our team will give you the necessary instructions, and you can always contact us if you’re unsure of anything, such as whether your baby can breastfeed or have other feeds beforehand. Bring your referral, Medicare card, and any requested documents. We also encourage parents to bring a favourite toy, blanket, or any other familiar item that can help your child feel more comfortable.

When Should You Seek Urgent Medical Attention?

Don’t wait for a scheduled scan if your child develops severe or worsening tummy pain, green vomit, or unusual drowsiness. Seek urgent medical assessment if your baby has persistent vomiting, poor feeding, or fewer wet nappies. Contact your GP or call 000 in a medical emergency.