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What are the signs of appendicitis in a child?
Appendicitis in kids: how the pain moves from the navel to the lower right belly, the other signs, who gets it, and what happens at the hospital.
The short answer
Appendicitis often begins with a mild fever and pain around the navel that gets worse and moves to the lower right side of the belly. Loss of appetite, nausea, vomiting, small mucus-y diarrhea and a swollen belly are common. It mostly affects kids and teens 5 to 20 and is rare in infants. It's a medical emergency: call the doctor right away, and don't give food or drink until you're told it's okay, in case surgery is needed.
The classic sign of appendicitis in a child is tummy pain that starts around the navel and then moves to the lower right side of the belly, getting steadily worse instead of better. Nemours KidsHealth calls appendicitis a medical emergency: if your child has these signs, call the doctor right away (Appendicitis in Kids & Teens, accessed November 13, 2026).
What the appendix is and what goes wrong
The appendix is a small, finger-shaped pouch attached to the large intestine in the lower right part of the belly. Appendicitis happens when it gets blocked and bacteria grow inside. KidsHealth lists a few things that can block it: a hard, pebble-like piece of stool, swollen lymph nodes in the intestines, or an infection such as parasites.
It isn't contagious, so a brother or classmate can't catch it.
Who gets it
KidsHealth says appendicitis mostly affects kids and teens from 5 to 20 years old and is rare in infants. That doesn't rule it out in a 3- or 4-year-old, but in younger children it's harder to spot because they can't describe where it hurts.
The signs, in the order they often appear
- Pain near the navel, sometimes with a mild fever. At first it can seem like an ordinary stomachache, and it may come and go.
- The pain moves to the lower right side and becomes steady and sharp.
- Other symptoms join in: loss of appetite, nausea and vomiting, diarrhea (often small amounts with mucus), and a swollen belly.
A few clues parents notice: a child who walks hunched over, doesn't want to jump or climb into the car, or cries when the car goes over a bump. Kids with an ordinary tummy bug often feel better after vomiting; with appendicitis, the pain usually keeps building.
When it bursts
If the infected appendix isn't treated, it's more likely to rupture. KidsHealth notes that a high fever reaching 104°F (40°C) may be a sign it has burst. A ruptured appendix can spread bacteria inside the belly, create a pocket of pus (an abscess), or infect the whole abdomen. That's why speed matters: the sooner it's caught, the easier it is to treat.
Why it's tricky to diagnose
KidsHealth explains that appendicitis can look like other problems, including stomach flu, kidney stones, pneumonia and urinary tract infections. To sort it out, the doctor examines the belly for tenderness and orders blood and urine tests. Many children also have imaging:
- X-rays of the abdomen and chest
- ultrasound, often first for kids because there's no radiation
- CT scan
- MRI
While you wait, the team may say no food or drink. That's in case your child needs surgery, so don't offer snacks or water until they say it's okay.
Treatment
Surgery. For most kids, a surgeon removes the appendix in an operation called an appendectomy. KidsHealth says it's usually done through three small cuts with a thin camera tool called a laparoscope. Children often go home the same day, though some stay longer. Before surgery, they may get IV fluids and antibiotics, and they get pain medicine afterward as needed. Appendectomies have a long track record of being done safely.
Antibiotics alone. KidsHealth notes that some children with mild, early appendicitis are treated with antibiotics instead of surgery. Your surgeon will explain whether that's an option for your child.
What recovery looks like
After laparoscopic surgery, most kids are walking around within a day and back to quiet play within days. Expect some soreness at the small incisions, tiredness, and a slow return of appetite. Your surgeon will give guidance on bathing, school and sports. Call if your child has rising fever, vomiting that won't stop, worsening belly pain, or redness and drainage from a cut.
What to pack if you're heading in
You may not have time to plan, but if you do grab a bag:
- a phone charger and a list of your child's medicines and allergies
- a comfort item and a favorite blanket
- loose pajamas that won't rub the belly
- a book or a small quiet toy for the long stretches of waiting
Helping your child feel braver
Hospitals can be frightening, especially when everything moves fast. Use short, honest words, and repeat them as often as your child needs: "Your tummy has a sore part inside. The doctors are going to help it get better. I'm staying with you." Let your child ask questions, and tell nurses what comforts them.
Afterward, retelling the experience helps kids make sense of it. A personalized book about a brave hospital stay can do that with your child as the one going home well. See the hospital book, a story about staying overnight in the hospital, and our guide to preparing a child for an MRI.
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FAQ
How can I tell appendicitis from a stomach bug?
Stomach bug pain is usually crampy and spread out, often eased after vomiting. Appendicitis pain tends to move to the lower right and keep getting worse. When in doubt, call.
Can a toddler get appendicitis?
It's uncommon under 5 and rare in infants, but possible. Young children with severe, worsening belly pain need to be seen.
Should I give pain medicine before going to the doctor?
Ask the doctor first. They may want to examine your child without pain medicine and may ask you to hold food and drink.
