Does appendicitis cause fever?

Written by Ren Zheng Xin
Gastroenterology
Updated on January 13, 2025
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Appendicitis often causes fever, due to systemic infection caused by inflammation entering the bloodstream. Generally, it only causes a low fever without chills. The temperature in suppurative appendicitis does not exceed 38 degrees Celsius. High fever above 38 degrees Celsius is mostly seen in cases of appendiceal perforation or concurrent peritonitis. In addition to fever, acute appendicitis also presents with abdominal pain, tenderness and rebound pain in the abdomen, tension in the abdominal muscles, as well as nausea, vomiting, and increased frequency of bowel movements due to reflexive gastric spasms.

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Appendicitis CT manifestations

Appendicitis on a CT scan presents with thickening of the appendix at the ileocecal area, pericecal fluid, high-density shadows in the appendiceal lumen and at its base, and an appendicolith. Clinical manifestations of appendicitis include referred pain in the lower right abdomen, and the examination and form of abdominal pain are important bases for diagnosing appendicitis. Combined with routine blood tests showing high levels of white blood cells and neutrophils, this indicates an inflammatory infection. Diagnosis of appendicitis can be confirmed with an abdominal CT or an ultrasound of the appendix area. Appendicitis is categorized as either acute uncomplicated appendicitis or acute gangrenous appendicitis. Acute uncomplicated appendicitis typically has good treatment outcomes and quick recovery; in contrast, conservative treatment for gangrenous appendicitis is generally less effective, necessitating surgical intervention.

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Does chronic appendicitis cause fever?

Chronic appendicitis typically presents clinically as recurring pain and discomfort in the lower right abdomen. Usually, there are no signs of fever with chronic appendicitis. Only when the inflammation of chronic appendicitis is uncontrolled might a low-grade fever occur. Sometimes, when chronic appendicitis undergoes an acute episode and becomes a purulent infection, high fever can occur. In such cases of chronic appendicitis with high fever, complications like appendix perforation, diffuse peritonitis, and septicemia can arise. Therefore, if fever occurs in chronic appendicitis, timely anti-infection treatment should be administered. If the infection is not well-controlled, timely surgical treatment is recommended.

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The dangers of chronic appendicitis

Patients with chronic appendicitis primarily exhibit persistent, recurring pain in the lower right abdomen, which may be accompanied by abdominal bloating, loss of appetite, and indigestion. These prolonged gastrointestinal symptoms can lead to malnutrition and a weakened immune system. Additionally, chronic appendicitis can acutely flare up and become suppurative, which can lead to perforation of the appendix. Once the appendix perforates, it causes diffuse peritonitis, leading to sepsis, septic shock, and even multi-organ failure, endangering the patient's life. This outlines the dangers associated with chronic appendicitis.

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How long after appendicitis can one have intercourse?

Regarding how long after appendectomy one can engage in sexual activities, it mainly depends on the treatment method used and the healing status after the surgery. Most cases of appendicitis can be treated with minimally invasive techniques, which not only cause less trauma and allow for quicker recovery but also reduce postoperative complications. The abdomen typically has two to three small puncture holes, each about one centimeter in length, and most patients can achieve sufficient strength to engage in sexual activities about a month after surgery. However, for traditional open surgery, the abdominal incision is usually longer, which may lead to incision infection and poor healing of the incision, and it generally takes about three months to achieve sufficient strength. For acute appendicitis, minimally invasive treatment is generally recommended, provided the patient's condition permits.

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Can appendicitis cause a fever?

Appendicitis can cause fever, and generally, it is considered an inflammatory condition. Besides fever, patients may experience abdominal pain, nausea, vomiting, etc. Typically, the abdominal pain manifests as lower right quadrant pain, which is referred pain. If a patient has fever and typical lower right quadrant pain, further investigations like abdominal ultrasound, complete blood count, and CT scans should be carried out. Diagnosing appendicitis is usually not difficult. The treatment of choice for appendicitis is generally surgical intervention, especially for early-stage patients with symptoms lasting less than three days, where an appendectomy is recommended. However, in some elderly patients with conditions like hypertension, diabetes, etc., who are not suitable for surgery, especially if the duration of the illness is more than three days, conservative medical treatment can be chosen. Conservative treatment primarily involves active anti-infection and anti-inflammatory measures and usually takes longer. (Medication should be administered under the guidance of a doctor.)