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Published on: 7/14/2026
An abdominal bulge after a DIEP flap procedure is typically caused by one of three issues: weakened abdominal muscles, separation of the rectus muscles (rectus diastasis), or a small hernia at the surgical site. While DIEP flap surgery preserves most abdominal muscle tissue, some patients still experience these complications during recovery. If you notice a new or growing bulge, it's important to consult your surgeon promptly to determine the underlying cause and appropriate treatment.
Not sure whether your symptoms warrant a call to the doctor today or can wait until your next appointment? Understanding the potential cause behind your abdominal bulge is the first step toward getting the right care. Take a free, instant, online symptom check to receive personalized insights based on your specific symptoms and medical history. In just a few minutes, you'll gain clarity on possible causes and clear guidance on next steps—empowering you to have a more informed conversation with your healthcare provider.
Reviewed for medical accuracy: 07/14/2026
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Submit your own QuestionAfter a DIEP flap breast reconstruction, tissue is taken from your lower belly to create the new breast. This surgery can sometimes weaken the muscles or change how they work. One common reason for an abdominal bulge is that the muscles in your belly may not be as strong after surgery. This can lead to a condition called rectus diastasis, where the muscles separate slightly, allowing a bulge to form. Another possibility is that a small hernia may develop, where a part of the internal tissue pushes out through a weakened spot in the muscle. These changes can make a bulge appear, especially when you stand, cough, or are active. Although this bulge might not always be dangerous, it can be uncomfortable and may need treatment if it causes pain or keeps growing. Your doctor may use physical exams or imaging tests like an ultrasound or CT scan to check the bulge. Depending on the findings, treatments can range from physical therapy and supportive garments to surgical repair if needed. If you're experiencing new or unusual symptoms after your surgery, you can use Ubie's free AI symptom checker to help understand what might be causing them before discussing with your healthcare provider.
(References)
Nahabedian MY, Momen B. Lower abdominal bulge after deep inferior epigastric perforator flap (DIEP) breast reconstruction. Ann Plast Surg. 2005 Feb;54(2):124-9. doi: 10.1097/01.sap.0000147174.31409.3a. PMID: 15655459.
Haddock NT, Culver AJ, Teotia SS. Abdominal weakness, bulge, or hernia after DIEP flaps: An algorithm of management, prevention, and surgical repair with classification. J Plast Reconstr Aesthet Surg. 2021 Sep;74(9):2194-2201. doi: 10.1016/j.bjps.2020.12.044. Epub 2020 Dec 26. PMID: 33487570.
Nelissen SH, Krijnen NA, Tsehaie J, Schellekens PPA, Paes EC, Simmermacher RKJ, Maarse W. Bulging after DIEP Breast Reconstruction: New Insights Concerning Rectus Diastasis and Medial Perforator Harvest. Plast Reconstr Surg Glob Open. 2023 Mar 8;11(3):e4840. doi: 10.1097/GOX.0000000000004840. PMID: 36910724; PMCID: PMC9995098.
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