The short answer
After general anesthesia you may wake up tired and groggy, feel sick to your stomach, and have a dry mouth, sore throat, or feel cold or restless. These effects wear off, though it may take a few hours. Nausea and vomiting can be treated with other medicines, and a nurse watches for them.
Feeling sick to your stomach is a listed effect of waking from general anesthesia.
Tiredness, grogginess, dry mouth, sore throat, feeling cold and feeling restless can come with it.
These effects wear off, but it may take a few hours.
Nausea and vomiting can be treated with other medicines.
On this page
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This page is for anyone about to have surgery with general anesthesia, including for cancer. It explains the nausea and grogginess many people feel afterward, and what helps.
What waking up is actually like
General anesthesia uses medicines that put you into a deep sleep-like state so you do not feel pain during surgery. You are not aware of your surroundings, and you will not remember the operation.
Coming back out of that has its own set of sensations. MedlinePlus describes waking up tired and groggy in the recovery room or operating room, and possibly feeling sick to your stomach, having a dry mouth or a sore throat, or feeling cold or restless.
That is a long list, and it is normal for several of them to arrive together.
The nausea is not you doing it wrong
Feeling sick after surgery is not a weakness. MedlinePlus lists it as a common effect while the anesthesia wears off.
Feeling sick after anesthesia is a side effect that can be treated.
MedlinePlus is explicit: nausea and vomiting can be treated with other medicines. A nurse will be watching for these side effects while you are recovering.
How long it hangs around
The reassuring part is that these effects wear off. The realistic part is that it may take a few hours.
If you woke up an hour ago and still feel queasy, tell your nurse. MedlinePlus says it may take a few hours to wear off.
What to do in the recovery room
A few simple things:
- Say something. Tell your nurse as soon as you feel sick.
- Mention the dry mouth or sore throat too. Those are also on the list.
- Ask your nurse when you can start drinking, and what to do about queasiness.
After you go home
MedlinePlus notes that general anesthesia is generally safe thanks to modern equipment, medicines and safety standards, and that most people recover completely without complications.
Its main instruction for the period afterward is to follow your surgeon's instructions while you recover and care for your surgical wound.
Since that page does not spell out warning signs for home, make sure you leave with your surgeon's own list — what symptoms to call about, which number to use, and what counts as an emergency. Ask for it in writing before discharge, when someone is still there to explain it.
If sickness continues once you are home and you cannot keep fluids down, call the number you were given right away rather than wait for your follow-up appointment. If you have trouble breathing or chest pain, call 911.
Note: the MedlinePlus page does not give home warning signs, so these lines are our safety advice, not MedlinePlus's.
Common questions
Is nausea after anesthesia a bad sign?
It is a recognised effect of waking from general anesthesia, listed alongside grogginess, dry mouth, sore throat, feeling cold and feeling restless.
How long does it last?
MedlinePlus says these effects will wear off, but it may take a few hours.
Can anything be done about it?
Yes. Nausea and vomiting can be treated with other medicines, and your nurse is monitoring for these side effects.
Should I say something or wait it out?
Tell your nurse. MedlinePlus says nurses monitor these side effects, and nausea and vomiting can be treated with other medicines.
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Sources last checked: 2026-10-02 what this meansLast updated: 2026-10-02Next planned review: 2027-08-11
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Cancer Explained does not originate medical claims. Every page restates guidance already published by the National Cancer Institute, the CDC, the USPSTF and the FDA, in plain language, with the source cited so you can check the original yourself. AI does the translating and organizing; automated checks test claims, citations, clarity and safety before anything publishes, and this is translation and navigation, not clinical judgment. Nothing here is personal medical advice, and no page can account for your particular situation.
Editorial status: Source checked — This page was written with AI assistance and then compared with the sources listed on it, looking for statements those sources do not back up. That check is not a sentence-by-sentence record and can miss errors. It is not a medical review, and it does not confirm the page is complete or right for your situation.
Human medical review: not completed. Pages here are not signed off by a clinician before they publish. That is not an oversight we are quietly working around: we restate published guidance and cite it, so the authority belongs to the source rather than to us, and every page names where its claims come from — you can verify us instead of trusting us. Where a volunteer clinician has reviewed a page, their name and credentials appear on it; where no name appears, no clinician has checked it. We are glad to have reviewers and are recruiting them, and we do not hold pages back waiting for one. Use this site to understand your situation and to ask better questions of the people treating you.
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