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Published on: 8/18/2026

How is upper left side abdominal pain and swelling diagnosed by healthcare professionals?

Doctors diagnose abdominal swelling using imaging tests such as CT scans and ultrasounds. These tools allow physicians to see inside the abdomen, identify the underlying cause of the swelling, and guide the most effective treatment plan.

Because abdominal swelling can stem from many possible causes—ranging from mild digestive issues to more serious conditions—understanding your symptoms early is key. Take a free, instant, online symptom check to better understand what may be going on and confidently navigate your next steps.

Reviewed for medical accuracy: 07/15/2026

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Explanation

To diagnose upper left side abdominal pain and swelling, healthcare professionals often rely on imaging tests such as CT scans and ultrasounds, which help to visualize the abdominal organs and identify any abnormalities. Before your appointment, you can use a free symptom checker to better understand your symptoms and prepare for your discussion with your doctor.

Possible Conditions

  1. Mesenteric Panniculitis: As discussed in the first reference, this condition involves inflammation of the fat tissue in the abdomen. It can cause pain and swelling, and is usually identified through imaging tests.

  2. Mesenteric Cyst: According to the third reference, mesenteric cysts are rare but can cause abdominal pain and swelling. These cysts can also be identified through imaging studies.

Diagnostic Process

  • History and Physical Examination: Doctors start by asking about symptoms and performing a physical exam.
  • Imaging Tests: CT scans or ultrasounds are often used to get a clear picture of what might be causing the symptoms.

In summary, diagnosing abdominal pain and swelling involves a combination of patient history, physical examination, and imaging tests to rule out conditions like mesenteric panniculitis or mesenteric cysts.

(References)

  • Sulbaran M, Chen FK, Farraye FA, & Hashash JG. (2023). A Clinical Review of Mesenteric Panniculitis. Gastroenterology & hepatology, 37705847.

  • Pragt-Weijer ME, Thunnissen RJ, de Langen ZJ, & Boomsma JH. (2001). [Abdominal pain and vomiting: a 4-year old boy with .... Nederlands tijdschrift voor geneeskunde, 11525092.

  • Ünlüer EE, Ünlüer S, Şahı N Y, Kamer KE, Karagöz A, & Tan GC. (2016). An uncommon cause of abdominal pain: Mesenteric cyst. Interventional medicine & applied science, 28250978.

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