A painless lump in a child's neck, armpit or groin — when does it need a specialist?

What is a swollen lymph node in a child?

Lymph nodes — sometimes called glands or lymph glands — are small, bean-shaped structures that are part of your child's immune system. They sit in clusters throughout the body: in the neck, behind the ears, under the jaw, in the armpit, in the groin, and deep inside the chest and abdomen.

Their job is to filter the fluid that drains from nearby tissues and to mount an immune response when the body detects infection. When a child has a cold, a throat infection, an ear infection, or even a skin cut on the hand, the nearest lymph nodes often swell as they do their job. This is normal and expected — it means the immune system is working.

In most cases, a swollen lymph node in a child's neck, armpit, or groin will shrink back to normal size within 1 to 3 weeks once the infection clears. No treatment is needed beyond treating the underlying infection.

However, a small number of persistently enlarged lymph nodes — ones that stay large after the infection has gone, keep growing, or that appear alongside other unexplained symptoms — need proper evaluation. The conditions that can cause this include other infections (such as glandular fever caused by the Epstein-Barr virus), inflammatory conditions, and, less commonly, cancers such as lymphoma or leukaemia.

This page does not diagnose. The information here is to help you understand what swollen lymph nodes can mean in children and to guide you on when to seek a specialist opinion. Only a doctor who has examined your child can advise you on their specific situation.

When a painless lump or swollen gland needs specialist review

The features below — alone or in combination — are the signals that a child's swollen lymph node should be evaluated by a paediatric oncologist. None of these mean cancer is certain. They mean an answer is needed.

If your child has even one of the signs above, we walk this journey with you — starting with a 45-minute consultation where a specialist takes a full history, examines your child, and tells you exactly which tests are needed and why.

How does a specialist evaluate a swollen lymph node in a child?

Most evaluations follow a clear, stepwise pathway. Understanding each step helps parents know what to expect and why each step is needed. No unnecessary tests. Decisions for healing, not billing.

Want to know what test your child needs first?

A 45-minute consultation with a CION specialist will give you a clear diagnostic plan — exactly which tests, in what order, and why.

We walk this journey with you — every step of the way

We understand that discovering a lump in your child is frightening. The fear of not knowing is often worse than the reality. Our approach is built around one goal: giving you a clear answer as quickly and compassionately as possible.

At CION Cancer Clinics, every child presenting with a suspicious lymph node is reviewed by a multidisciplinary team — medical oncologists, surgical oncologists, and haematologists working together. This is not one doctor's opinion: it is a team of specialists reviewing the same evidence. This is what we mean when we say tumour board for every patient.

We believe in transparent costs and no unnecessary tests. Before any investigation is ordered, your family will understand exactly what it is for, what it costs, and what the result will tell us. We offer CGHS, ECHS, and most major insurance panels, and EMI options are available for families who need them.

Across our 35+ centres in Telangana and Andhra Pradesh, you are likely to find a CION specialist within accessible distance. Our 17 super-specialist oncologists have a combined 150+ years of experience — and each consultation is a full 45 minutes, not a rushed appointment.

You deserve this kind of care for your child. If you have noticed a painless lump in your child's neck, armpit, or groin that has not gone away, please call us or book online. We will be in touch the same day.

Families who came to us with the same worry — now at peace

Whether it turned out to be an infection or something that needed treatment, every family left knowing exactly what was happening — and exactly what to do next.