Appendicitis is a medical emergency that occurs when the appendix becomes inflamed and infected. The appendix is a small, tube-shaped organ attached to the large intestine, and although its function remains uncertain, its inflammation can lead to severe complications if left untreated. Recognizing the symptoms of appendicitis early is crucial for avoiding complications such as rupture, abscess, or sepsis. This article explores the signs and symptoms of appendicitis, including common, less obvious, and age-specific indicators.
What Is Appendicitis?
Appendicitis occurs when the appendix becomes blocked—often by stool, a foreign object, or cancer—and bacteria multiply inside, causing swelling, infection, and pain. If the condition progresses, the appendix may burst, releasing bacteria into the abdominal cavity. This can lead to peritonitis, a life-threatening infection requiring immediate treatment.
Appendicitis affects approximately 5–9% of people at some point in their lives and can occur at any age, though it’s most common between ages 10 and 30.
Early Signs of Appendicitis
In many cases, symptoms begin subtly and worsen over several hours or days. The early warning signs of appendicitis can resemble other digestive issues, so careful observation is important.
1. Abdominal Pain Near the Belly Button
The first and most common symptom is vague pain around the navel (belly button). Initially, the pain may not feel severe, and it might be easy to ignore. Over time, this discomfort typically shifts to the lower right side of the abdomen, becoming sharper and more localized. This migration of pain is a hallmark symptom.
2. Loss of Appetite
People with appendicitis often lose their appetite. This symptom can accompany or follow abdominal discomfort and is usually one of the first noticeable changes in behavior.
3. Nausea and Vomiting
Shortly after abdominal pain begins, many individuals feel nauseated or vomit. This is caused by the inflammation of the appendix interfering with digestive function. However, nausea alone isn’t diagnostic—it must be considered alongside other symptoms.
4. Fever
A mild fever (typically 99°F to 100.5°F or 37.2°C to 38°C) may develop early on. As the infection progresses, especially if the appendix bursts, the fever can rise significantly, accompanied by chills and shivering.
5. Abdominal Swelling or Bloating
The inflamed appendix can cause the abdomen to feel full, swollen, or bloated. This is more noticeable in children and infants, where the entire abdomen might become rigid.
Progressing Symptoms of Appendicitis
As the infection worsens, the symptoms become more intense and localized. Here’s what typically happens next:
6. Sharp Pain in the Lower Right Abdomen
Within hours of the initial discomfort near the belly button, the pain typically moves to the lower right side of the abdomen (called the right iliac fossa). The pain becomes constant, sharp, and worsens with movement, deep breathing, coughing, or sneezing.
7. Rebound Tenderness
This refers to increased pain when pressure applied to the abdomen is suddenly released. It’s a clinical sign doctors often check for during a physical exam and may indicate peritoneal irritation.
8. Inability to Pass Gas or Have a Bowel Movement
A blocked appendix can interfere with the gastrointestinal tract. People may feel constipated or gassy, and be unable to relieve themselves. In some cases, diarrhea may occur instead, especially in children.