Appendicitis

Appendicitis is inflammation of the appendix, a small pouch attached to the large bowel on the lower right side of the belly. It is most common between the ages of 10 and 20 but can happen at any age. If not treated, the appendix can burst and cause a serious infection.

Last updated Nov 9, 2026

What it is

The pain usually starts around the belly button and moves to the lower right side over a day.

It is usually treated by removing the appendix, often with keyhole surgery. Some mild cases may be treated with antibiotics.

Common signs

  • Pain that starts in the middle of the belly and moves to the lower right
  • Pain that is worse when coughing, walking or pressing the area
  • Loss of appetite, feeling sick, fever

How it is usually diagnosed

  • Examination of the belly
  • Blood and urine tests
  • An ultrasound or CT scan

Records worth keeping

Keeping these together makes each appointment easier, especially when you see a new doctor:

  • Scan reports
  • Operation notes and the histology report of the removed appendix
  • The discharge letter

Questions to ask your doctor

  • Will I need surgery, or could antibiotics work?
  • How long is recovery, and when can I return to work or sport?
  • Which signs after surgery mean I should come back?

When to get help right away

Call 112 or go to the nearest emergency department if you have:

  • Pain in the belly that is getting worse
  • Pain that suddenly spreads across the whole belly
  • Fever with belly pain, or vomiting that does not stop

This page is general information. It is not a diagnosis and does not replace a doctor who knows your history. Medfold keeps your records organised; it does not interpret them.

Sources