The first week after a sleeve gastrectomy is the hardest stretch of the whole recovery. Knowing what's coming makes it considerably easier, because most of what happens is normal and temporary — it just doesn't feel that way at the time.
Here are the four things almost everyone runs into.
1. Pain
The gastric sleeve is minimally invasive, but it is still major surgery. Expect moderate pain and expect to need a couple of weeks before you feel like yourself.
Your team will send you home with a pain management plan. The one piece of advice worth repeating: take the medication on the schedule you were given rather than waiting for the pain to get bad. Staying ahead of pain takes less medication than catching up to it, and most patients find they need it for about a week.
If the pain is worse than you were told to expect, or it changes character — sharp, or in your shoulder, or accompanied by fever — that is a call to your surgeon, not a thing to manage at home.
2. Nausea and stomach spasms
Most patients get some. Your stomach has just been through a significant procedure and the remaining sleeve is swollen, so it spasms.
The single biggest thing you control here is how you drink. Sip constantly and slowly. Big gulps stretch a stomach that has no room to be stretched, and that is what triggers spasms and vomiting for most people in week one.
Programs routinely send patients home with anti-nausea and antispasmodic medication. If you have it, take it as directed and stay ahead of the symptoms rather than waiting them out. If you weren't given anything and you're struggling, call the office — this is a common enough problem that they will have an answer, and it isn't one to solve from a pharmacy aisle or a website.
3. Tiredness
You will be more tired than you expect, and it stacks. Your body is healing from surgery while running on a fraction of its usual calories, using energy pathways it isn't used to.
Take the first week genuinely easy. Unless you have a desk job, plan on two weeks off rather than one — patients who go back early are the ones who tell you afterwards that they wish they hadn't.
Hitting your protein target helps here more than anything else. Protein is what keeps your body burning fat rather than breaking down muscle for fuel, and muscle loss is a real part of why people feel so flattened in the early weeks.
4. Constipation and diarrhea
Your digestion is adjusting to a smaller stomach, a liquid diet, and pain medication all at once. Bowel habits get unpredictable.
Constipation is common, and pain medication is often the reason. Fluids help most — which is another argument for hitting the 64 oz target. Programs commonly recommend something to get things moving if fluids alone aren't enough. Ask yours what they want you to use and how often, rather than reaching for whatever is in the cabinet. Some over-the-counter laxatives are a poor idea alongside particular medications or kidney conditions, and your team knows which applies to you.
Diarrhea is actually the more common of the two on a full liquid diet, and protein supplements can make it worse. It usually settles as you move onto pureed and soft foods.
Either way, call your team if it doesn't resolve. Several loose stools a day that persist is worth having looked at rather than waited out, and dehydration is the complication that sends bariatric patients back to hospital more than any other.
The short version
All four of these are normal. None of them means something has gone wrong. They pass, and weeks three and four are markedly better — you start eating actual food again, the pain recedes, and the energy comes back.
(See what to expect in weeks 3 and 4 after gastric sleeve surgery.)
