Nausea and Vomiting After Surgery: Why It Happens and What Helps
Feeling sick or throwing up after surgery is extremely common: anaesthetists have studied it so thoroughly it has its own name and acronym, PONV (postoperative nausea and vomiting). If it's happened to you, you are absolutely not alone, and there is a lot that helps.
PONV affects up to 30% of the general surgical population, and up to 80% of patients who fall into the "high-risk" category described below. Some anaesthesia researchers have called it "the big little problem," because although it's rarely dangerous on its own, it's one of the things patients report most often, and it can genuinely delay going home after day surgery.
Anaesthetists commonly use a simple 4-factor score (the Apfel score) to estimate PONV risk before surgery even starts:
- Being female
- Being a non-smoker
- A history of motion sickness or previous PONV
- Needing opioid pain relief after surgery
Each additional factor roughly doubles the risk: about 10% with none of these factors, 20% with one, 40% with two, up to around 60–80% with three or four. None of this is within your control on the day. It's simply useful for your team to plan preventive anti-nausea medication in advance if you're higher risk.
PONV most commonly occurs within the first 24 hours after surgery, often as the anaesthesia wears off or shortly after eating or drinking again. For most people it settles within that first day; some feel queasy on and off for up to 48 hours, particularly if they're also on opioid pain relief, which itself commonly causes nausea.
- Sip clear fluids slowly rather than gulping, small amounts, often
- Start with small, bland meals (crackers, toast, rice) before returning to normal food
- Ginger (tea, ginger ale with real ginger, ginger chews) is a commonly used, gentle option
- Fresh air and avoiding strong smells (perfume, cooking odours) can help
- Move slowly when sitting up or changing position, sudden movement makes nausea worse
- Take any prescribed anti-nausea medication proactively rather than waiting until you feel terrible
- If opioids seem to be a big part of the problem, ask your team whether an alternative or additional pain-relief option is appropriate for you
Uncontrolled PONV is also one of the more common reasons a same-day surgery patient ends up staying in hospital overnight unexpectedly — so raising it early with your nursing team, rather than waiting, is genuinely the right move.
- NIH / NCBI StatPearls: Postoperative Nausea. ncbi.nlm.nih.gov
- Apfel simplified risk score for PONV: widely used in anaesthesia practice. overview
For a complete list of sources used across Postopcare.info, see our Sources page.
Your recovery toolkit
Free interactive tools to track your recovery day by day. Everything stays on your device — nothing is uploaded or shared.
These tools support — never replace — the advice of your surgical team. If something feels wrong, contact your doctor or emergency services.