Learning path Step 7 of 18

Complications and Warning Signs

What can go wrong, how often it actually happens, the symptoms that mean you should call your surgeon, and the follow-up that catches problems early.

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1. 1 When to Call Your Surgeon: The Warning Signs That Matter Sorts post-op symptoms into the ones that need an emergency room now, the ones that need a phone call today, and the ones that can wait, and explains why a fast heart rate outranks pain as an early signal.
2. 2 Dumping Syndrome: What It Is, Who Gets It, and How to Manage It Explains the mechanism behind early and late dumping, how common each is after bypass and sleeve, the dietary changes that control it, and why it eases for most people over the first year or two.
3. 3 Reactive Hypoglycemia After Gastric Bypass Post-bariatric hypoglycemia is not the same thing as dumping. It usually starts more than a year after surgery, it is driven by an oversized insulin response, and it needs proper testing rather than guesswork.
4. 4 Leaks and Strictures: How Often They Happen and How They Are Fixed Registry data now puts 30-day leak rates well under 1 percent, while single-center series run higher. This covers why the numbers differ, how leaks and strictures present, and how both are treated endoscopically.
5. 5 Marginal Ulcers and Why NSAIDs Matter After Bypass A marginal ulcer forms where the gastric pouch meets the jejunum, and NSAIDs and smoking are the two risk factors you control. Also covers acid medication, extended-release pills, and post-op absorption changes.
6. 6 Gallstones After Rapid Weight Loss Rapid weight loss makes bile more likely to form stones, and many bariatric patients develop them in the first two years. Covers ursodiol, what the trial evidence shows, and why routine gallbladder removal was dropped.
7. 7 Hair Loss After Bariatric Surgery Post-operative shedding is telogen effluvium, it usually starts around month three and settles by the end of the first year, and it is temporary. Covers what is worth testing, what the evidence supports, and what does not help.
8. 8 Nutrient Deficiencies and the Labs That Catch Them Which deficiencies matter after each operation, what they do if left alone, the ASMBS supplementation doses and monitoring schedule, and why thiamine is the one deficiency that is a same-day emergency.