Causes of Appendicitis

Written by Xu Jun Hui
General Surgery
Updated on January 24, 2025
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The appendix is connected to the cecum at one end, has a narrow lumen, and is rich in lymphatic tissue. The anatomical basis of the appendix makes it prone to inflammation. Generally, appendicitis is caused by different obstructions in the appendix, such as fecaliths, fecal masses, food residues, and parasites like roundworms, which can all lead to obstruction of the appendix and trigger acute appendicitis. Additionally, gastrointestinal dysfunction can also cause spasms and contractions of the muscles in the appendix wall, affecting the emptying of the appendix and its blood circulation, leading to inflammation of the appendix. Appendicitis requires timely treatment, and surgery might be necessary for symptomatic support.

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Written by Ren Zheng Xin
Gastroenterology
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Appendicitis how many days to be discharged

The length of hospital stay after appendicitis treatment varies greatly depending on the individual's constitution, the severity of the appendicitis, and the method of treatment used. If the symptoms are mild and only conservative medication treatment is chosen, then you can be discharged after the symptoms disappear. If surgical treatment is chosen, then it's typical to observe for three to five days post-surgery; if there are no significant signs of infection or pus formation, then discharge can be considered, followed by observational treatment. If there is significant pus formation, or cases of gangrene or perforation that lead to severe peritonitis, routine anti-infection treatment should be administered post-surgery. Therefore, the treatment period may be longer, requiring a waiting period until the inflammation is completely resolved before discharge.

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Written by Huang Gang
Gastroenterology
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Acute appendicitis clinical features

Acute appendicitis generally presents primarily as abdominal pain, specifically migratory pain to the lower right abdomen. Initially, the patient may experience stomach pain, which gradually shifts to pain in the lower right abdomen. Whether it is appendicitis needs to be diagnosed by a physical examination by a doctor, or an ultrasound of the appendix during the acute phase can be performed. If the appendix appears significantly swollen on the ultrasound, it can also confirm the diagnosis of acute appendicitis. Typically, the best treatment for acute appendicitis is surgery, especially if the condition is very severe and critical, as it may lead to perforation of the appendix and result in purulent peritonitis, which is very serious and life-threatening. Therefore, once diagnosed with acute appendicitis, it is best to be hospitalized for surgery.

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Written by Ren Zheng Xin
Gastroenterology
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Does appendicitis cause fever?

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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Written by Ren Zheng Xin
Gastroenterology
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Can appendicitis cause a fever?

Appendicitis can cause fever. After the fever, a routine blood test will show a significant increase in white blood cells, which is often referred to as an elevated blood profile. In addition to fever, appendicitis may also cause vomiting and nausea. A typical symptom is abdominal pain, starting around the navel and then gradually moving to the lower right abdomen. For the fever, active symptomatic fever reduction should be pursued, or appendectomy can be chosen. Currently, laparoscopic appendectomy is more common, with less bleeding during the operation and faster post-operative recovery.

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Written by Li Jin Quan
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Should you avoid certain foods if you have chronic appendicitis?

The majority of chronic appendicitis is transformed from acute appendicitis after treatment. Clinically, it mainly manifests as recurrent pain and discomfort in the lower right abdomen. In cases of chronic appendicitis, it is important to pay attention to a reasonable diet, avoid overeating and the consumption of gastrointestinal irritants, including spicy foods and some hard, cold foods, as these can induce pain in the lower right abdomen. Additionally, the diet should be low in sodium, sugar, and fat. Consumable options may include liquid or semi-liquid foods, as well as foods like yogurt. It is also advisable to eat fruits and vegetables rich in vitamins and anti-inflammatory substances, such as apples, bananas, cabbage, and cauliflower.