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Published on: 7/14/2026
A lump in the middle of the abdomen is most often caused by a hernia, such as a Spigelian or umbilical hernia, where tissue pushes through a weak spot in the abdominal wall. Other possible causes include an abdominal hematoma (a collection of blood under the skin) or, less commonly, a vascular condition like an abdominal aortic aneurysm—especially if the lump feels pulsatile or throbbing.
Because the causes range from harmless to potentially serious, identifying the source of an abdominal lump early is important. A free, instant, online symptom check can help you understand what may be behind your symptoms and guide your next steps—whether that's monitoring at home or seeking urgent care.
Reviewed for medical accuracy: 07/14/2026
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Submit your own QuestionThere are several conditions that can result in a lump in the middle of the abdomen. One common cause is a hernia, where part of the intestine or other tissue pushes through a weakness in the abdominal wall. A specific type called a Spigelian hernia occurs along the side of the rectus abdominis muscle and can appear as a lump in this region.
Other possible causes may include masses, such as tumors, though there are other benign causes as well, such as lipomas or cysts, which are typically soft and non-tender. Although less common, if the lump is tender and pulsatile (throbbing with your heartbeat), it might indicate a vascular condition such as an abdominal aortic aneurysm.
Because each of these causes has different implications, it is important to have a healthcare provider evaluate a new or changing abdominal lump to determine the correct diagnosis and appropriate management. To better understand your symptoms and potential causes, you can start with our free AI symptom checker for personalized guidance.
(References)
Updated 2023 Apr 10]. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2025 Jan-. Available from: https://www.ncbi.nlm.nih.gov/books/NBK519551/
Updated 2023 Jun 26]. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2025 Jan-. Available from: https://www.ncbi.nlm.nih.gov/books/NBK538290/
Updated 2023 Dec 13]. Available from: https://www.ncbi.nlm.nih.gov/books/NBK395554/
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