As with any surgery, bariatric surgery has certain risks. The risks and complications will vary according to the type of bariatric surgery you have. Make sure you discuss your risks with your surgeon. These can include:
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Infection, including in the stomach, abdomen (peritonitis), the cuts (incisions), the urinary tract or the lungs, as well as other locations
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Leaks, blockage at a site where tissue is sewn or stapled together (anastomosis) or elsewhere due to adhesions, or bleeding. This will require more procedures or even another major surgery to fix.
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Breathing problems, such as pneumonia or collapsed lung. This may require breathing help with a machine (ventilator) and other procedures, such as a chest tube.
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Acid reflux, ulcers, or esophagitis
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Dumping syndrome (diarrhea, cramps, abdominal pain, and other gastrointestinal symptoms)
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Kidney failure, possibly requiring dialysis on a short-term or long-term basis
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Internal hernia, which needs surgery to fix
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Small bowel blockage, which often requires surgery
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Depressed mood or other psychological issues
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Blood clots in the legs that may travel to the lungs or heart and be life-threatening
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Injury to the spleen. Sometimes the spleen needs to be removed, which can lead to problems with immunity.
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Recurrent vomiting that needs a procedure to stop the problem
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Development of a hernia at one of the incision sites (including internally)
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Problems from anesthesia, such as allergies and other reactions
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Increased risk of fractures due to reduced bone mineral density
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Stroke
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Heart issues such as heart attacks and irregular heartbeats (arrhythmias)
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Other rare but severe problems
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Long-term nutritional issues, even when taking supplements. In some cases, supplements must be given by IV (intravenously) for absorption.
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Fluid loss (dehydration)
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Death
