One of the most stressful parts of the early post-operative period after gastric sleeve surgery is not knowing which symptoms to take seriously and which to ride out. Every twinge gets scrutinised. Every wave of nausea prompts a Google search at two in the morning. The information online is a mixture of the genuinely useful and the alarmist, and it is not always easy to tell them apart when you are tired, sore, and anxious.
This article is our attempt to lay it out clearly: what is normal in the first few weeks after gastric sleeve surgery, what warrants a call to your GP or surgical team, and what requires emergency care without delay.
What Is Normal
Pain around the incision sites is expected for the first one to two weeks. The laparoscopic incisions are small but they are real wounds, and the internal surgical work involves significant tissue handling. Pain should be manageable with prescribed oral painkillers and should gradually reduce over the first week.
Shoulder tip pain caused by residual carbon dioxide gas from the laparoscopic procedure is common in the first two to three days post-op. It can feel alarming because it is in an unexpected location, but it is benign and resolves as the gas absorbs and disperses. Gentle walking helps move it along.
Nausea in the first days after surgery is normal. Your stomach has been significantly reduced in size, you are on a liquid diet, and you are recovering from a general anaesthetic. Most patients find it settles substantially within the first week. Fatigue in the first two to four weeks is also very normal and often underestimated. Low energy, afternoon tiredness, and an inability to concentrate are all part of normal recovery and improve progressively over the first month.
A low-grade temperature below 38 degrees Celsius in the first 24 to 48 hours can be a normal inflammatory response to surgery. This is different from a persistent fever that develops or fails to settle after the first couple of days.
What Warrants a Call to Your GP or Surgical Team
A fever above 38 degrees Celsius that persists for more than a day, or any fever that develops after the first few days rather than immediately post-op, should prompt a call. Wound redness, swelling, warmth, or discharge that is spreading rather than improving needs assessment. Inability to keep any liquid down for more than 24 hours needs medical attention. Pain that is not responding to prescribed analgesia, or that is significantly worsening rather than following a gradual improvement trajectory, should be discussed with your team.
What Requires Emergency Care Without Delay
A persistently elevated heart rate above 100 beats per minute at rest is one of the most important warning signs in the post-operative period. Tachycardia is often the first detectable sign of a serious complication including a staple line leak. If your resting heart rate is consistently elevated and does not settle, go to A&E and tell them you have had recent bariatric surgery.
Severe abdominal pain that comes on suddenly or is rapidly worsening, particularly in the upper left abdomen, requires emergency assessment. Signs of sepsis, including a temperature above 38.3 degrees Celsius combined with a raised heart rate and rapid breathing, confusion, or extreme fatigue, require immediate emergency care. Call 999 or go directly to A&E. Difficulty breathing, chest pain, or coughing up blood also require 999 immediately.
Any time you feel that something is seriously wrong, act on that feeling. Emergency teams would far rather assess you and find nothing sinister than have you wait at home until a manageable complication becomes a crisis.
A Note on Getting Help When You Had Surgery Abroad
If you had your surgery abroad, as we did, always tell any healthcare professional you contact that you have had recent bariatric surgery. Carry a copy of your discharge paperwork at all times. UK A&E departments are well equipped to manage post-bariatric surgical complications. You do not need to return to your surgical centre for emergency care.
Sources
NHS. Complications of weight loss surgery. Available at: https://www.nhs.uk/conditions/weight-loss-surgery/risks/
NICE. Obesity: identification, assessment and management. Clinical guideline CG189. Available at: https://www.nice.org.uk/guidance/cg189
BOMSS. Guidelines on peri-operative and postoperative biochemical monitoring and micronutrient replacement for patients undergoing bariatric surgery. Available at: https://www.bomss.org.uk/
UK Sepsis Trust. Sepsis information for patients. Available at: https://sepsistrust.org/
About this content
This blog is written by James and Kirsten, a couple from the UK who had gastric sleeve surgery together in March 2024.
We started this blog because we couldn't find any sources of content that details before surgery, the surgery and then life post surgery - so we decided to write one ourselves.
Everything on this site is based on our own experience and the research we have done along the way. It is not medical advice. Gastric sleeve surgery is a serious procedure and every patient's journey is different. Please always consult your own bariatric team or GP before making any decisions about your health or treatment.
Some posts on this site may contain featured or sponsored content, or affiliate links. Where this is the case, it will always be clearly stated at the top of the article. Our opinions are always our own.
Publish Date: 26 June 2026 | Last Reviewed: 26 June 2026 | Next Planned Review: 26 December 2027