Understanding your surgery

Types of Anaesthesia: What to Expect Afterward

General, spinal, epidural, or a nerve block — the type you had shapes the first hours and days of your recovery.

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Based on AAOS (OrthoInfo) and Cleveland Clinic guidance · written for a global audience (last checked Oct 2026)

Most surgery pages talk about the operation itself; not many talk about the anaesthesia that made it possible, even though it's often what shapes your first few hours (or days) afterward. If you woke up groggy with a sore throat, or came out of theatre with a leg you couldn't feel or move, the anaesthesia type — not the surgery — usually explains why. AAOS groups the options into two broad families: general anaesthesia, which affects your whole body and brain, and regional anaesthesia, which numbs only part of you while you stay awake or lightly sedated. Regional anaesthesia further splits into spinal blocks, epidural blocks, and peripheral nerve blocks.

Which one you had is a decision your anaesthetist makes with you based on the surgery, your health, and your own preference where there's a genuine choice (last checked Oct 2026). This page is about what each one means for your recovery, not about which is "better" — that's a conversation for your anaesthetic team.

General anaesthesia

General anaesthesia acts on your brain and nervous system to make you temporarily unconscious, delivered by injection, inhaled gas, or both, usually with a breathing tube in place while you're under. AAOS notes common after-effects include a sore throat, a hoarse voice that can last several days, headache, nausea, and drowsiness, with a small added risk of more serious complications like heart attack or stroke in people with existing heart or lung disease.

For a fuller walkthrough of the first 24 hours after general anaesthesia specifically, see our dedicated general anaesthesia recovery guide.

Source: AAOS OrthoInfo: anaesthesia for hip and knee surgery (last checked Oct 2026)

Spinal anaesthesia

A single injection of numbing medicine into the fluid around your spinal cord blocks pain and movement below the injection site, while you stay awake or lightly sedated and breathe on your own. Cleveland Clinic describes the numbness as typically lasting about 1.5 to 6 hours depending on the medication and dose. Before you're cleared to leave recovery, your care team confirms you can move your legs, feel touch normally, sit or stand safely, and pass urine without difficulty.

Common side effects include backache, headache, a temporary drop in blood pressure, and nausea. A specific type of headache — a "spinal headache," worse when sitting or standing and easing when lying flat — can occasionally follow a spinal (or epidural) and is worth mentioning to your care team if it happens, since it's treatable.

Source: Cleveland Clinic: spinal anaesthesia (last checked Oct 2026)

Epidural anaesthesia

An epidural works similarly to a spinal block but delivers medicine through a thin catheter placed just outside the spinal fluid space, rather than a single injection into it — which means it can be dosed continuously for as long as numbing is needed, not just for a few fixed hours. AAOS notes it takes around 20 to 30 minutes to start working. Cleveland Clinic advises against driving, operating machinery, or drinking alcohol for at least 24 hours after having an epidural, and some activities may need to wait a day or two on your provider's specific advice.

Source: Cleveland Clinic: epidural anaesthesia (last checked Oct 2026)

Peripheral nerve blocks

Rather than numbing a whole region of the body, a nerve block targets the specific nerves supplying the area being operated on — commonly used for shoulder, hip, knee, foot, and hand surgery. AAOS describes options ranging from a single injection to a continuous catheter that can keep the area numb "for up to several days after surgery," which is why nerve blocks are often chosen specifically for post-operative pain control rather than just for the operation itself. Cleveland Clinic notes pain relief from a nerve block can genuinely vary, sometimes lasting anywhere from a few days to weeks.

The safety point worth knowing in advance: a limb that's numb and weak from a nerve block can't protect itself the way it normally would. Follow your team's instructions about slings, splints, crutches, or avoiding weight-bearing on that limb until the block has fully worn off, and contact your care team promptly for any burning pain, new weakness, or tingling that doesn't fit the expected picture.

Sources: AAOS OrthoInfo: anaesthesia for hip and knee surgery · Cleveland Clinic: nerve blocks

Frequently asked questions

What's the difference between a spinal block and an epidural?

A spinal block is a single injection directly into the spinal fluid, giving numbness that wears off after a set window, commonly 1.5 to 6 hours. An epidural uses a catheter placed just outside that space, allowing continuous dosing for as long as numbing is needed rather than a fixed duration. Both are types of regional anaesthesia and both can cause a spinal-type headache in a minority of patients.

How long until feeling comes back after spinal anaesthesia?

Cleveland Clinic describes numbness typically lasting about 1.5 to 6 hours depending on the medication and dose used. Before discharge, your care team checks that you can move your legs, feel touch normally, and stand or sit safely, so the exact timing is confirmed with you directly rather than left to guesswork.

Is it safe to have a numb, weak limb after a nerve block?

Yes, with the right precautions, which is exactly why your team gives you specific instructions, like using a sling, splint, or crutches, and avoiding weight-bearing until sensation and strength return. Because the limb can't feel pain or protect itself normally while numb, following those instructions matters more than it might seem, and any burning pain, new weakness, or unexpected tingling should be reported to your care team promptly.

When can I drive after regional anaesthesia (spinal, epidural, or a nerve block)?

Cleveland Clinic advises against driving for at least 24 hours after an epidural, and similar caution applies after a spinal block or nerve block until sensation, strength, and coordination are fully back to normal, plus any sedation has worn off. Your own care team will confirm when it's safe for your specific procedure and anaesthesia type.

Also useful

General Anaesthesia Recovery, the first 24 hours in detail
Hip Replacement Recovery, a procedure commonly done under spinal or regional anaesthesia
Knee Replacement Recovery, another common candidate for regional anaesthesia and nerve blocks
Ankle Surgery Recovery, foot and ankle procedures are frequently done with a peripheral nerve block

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