Anaesthesia · UK
Local anaesthetic in the UK - what it is and when it is enough.
Numbing one small area while you stay fully awake. It is what makes minor surgery possible in a treatment room rather than a theatre - and knowing when it is enough, and when it is not, is the whole point.
Indicative pricing
What anaesthesia adds to the cost of a procedure.
Local anaesthetic is almost always included in the price of the procedure itself. These ranges show what the alternatives add if you need them.
In short
Local anaesthetic is usually included in the procedure fee. Sedation or a general adds £800–£2,500.
| Anaesthetic or procedure | Indicative range | Typical duration | Aftercare |
|---|---|---|---|
| Local anaesthetic (included in procedure) | Usually included | 1–5 min onset | Immediate |
| Minor skin procedure under local | £300–£700 | 20–30 min | Same day |
| Joint or soft tissue injection | £250–£600 | 15 min | Same day |
| Regional nerve block (with anaesthetist) | £500–£1,200 | 20 min | Same day |
| Local anaesthetic with sedation | £800–£1,800 | 45 min | Escort needed |
| General anaesthetic (for comparison) | £1,200–£2,500 | 1–3 hours | Day case |
Local anaesthetic is rarely billed separately - it is part of the procedure. What changes the price meaningfully is needing an anaesthetist for sedation or a regional block, and needing a theatre and recovery bay rather than a treatment room. Where a procedure can safely be done under local, it is almost always cheaper, faster and safer.
The problem
The anaesthetic decision changes the whole experience.
The same operation can mean twenty minutes in a treatment room or a day in hospital, depending only on the anaesthetic. Choosing well means weighing anxiety, procedure length, and how still you need to lie - not just what is technically possible.
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Anxious about being awake?
Sedation alongside local anaesthetic leaves you relaxed and often with little memory of it, without the recovery time a general anaesthetic needs.
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Worried it will not work?
The clinician tests numbness before starting. Additional anaesthetic can be given at any point - nobody should be pressing on through pain.
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Had a bad reaction at the dentist?
Most reported allergies turn out to be a response to adrenaline or a vasovagal faint rather than true allergy. It is worth establishing which.
When it helps
When local anaesthetic is enough.
The procedures it covers comfortably, the ones where it is not the right choice, and the reaction that means emergency care.
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Skin lesion and mole excision
Excision of moles, cysts, lipomas and skin cancers under local infiltration. The commonest use of local anaesthetic in UK private practice.
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Joint and soft tissue injections
Corticosteroid injections into shoulders, knees and tendon sheaths, often mixed with local anaesthetic to give immediate as well as delayed relief.
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Gynaecological procedures
LLETZ, colposcopy biopsies, coil fitting and endometrial biopsy are all routinely done with local anaesthetic in an outpatient clinic.
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Hand and foot surgery
Carpal tunnel release, trigger finger release and ingrown toenail surgery, often using a ring or digital block rather than direct infiltration.
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Dental and oral procedures
The most familiar local anaesthetic of all. An inferior alveolar or infiltration block numbs teeth and gum for fillings, extractions and implants.
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Eye surgery
Most cataract surgery in the UK is performed under topical or sub-Tenon local anaesthetic, with the patient awake and comfortable throughout.
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When local is not enough
Long procedures, deep or infected tissue, children, severe anxiety, or anything needing complete stillness may need sedation or a general anaesthetic instead.
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Red flag: dizziness, metallic taste, palpitations
Ringing in the ears, a metallic taste, tingling around the mouth, confusion or palpitations after an injection can signal local anaesthetic toxicity - tell the clinician immediately.
Anaesthetic options
Local is one of several options.
What each type of anaesthesia involves - and which procedure it suits.
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Topical anaesthetic
Cream, gel, drops or spray applied to the surface. EMLA and Ametop numb skin before cannulation or injection; drops are used for eye procedures.
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Local infiltration
Anaesthetic injected directly into the tissue around the site. The standard for skin surgery, biopsies and suturing, working within minutes.
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Nerve block
A single injection near a nerve numbs everything it supplies - a digital block for a finger, a dental block for a quadrant of the mouth, or a femoral block for the leg.
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Regional anaesthesia
Larger blocks such as a brachial plexus block for the arm, performed by an anaesthetist under ultrasound guidance, numbing an entire limb for surgery.
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Local with sedation
Midazolam or propofol given intravenously alongside local anaesthetic. You stay rousable but relaxed, often with little memory. An escort home is required.
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Spinal and epidural anaesthesia
Anaesthetic injected around the spinal cord to numb everything below the waist. Standard for caesarean section and much lower limb and pelvic surgery.
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General anaesthetic
Complete unconsciousness with airway support. Necessary for long, deep or intracavity surgery, and for anyone unable to lie still or tolerate being awake.
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Tumescent local anaesthesia
Large volumes of very dilute anaesthetic with adrenaline, used in liposuction and varicose vein surgery to numb a wide area while limiting bleeding.
Safety and recovery
What to expect - honestly.
Local anaesthetic is one of the safest interventions in medicine, and serious complications are rare enough to be reportable events. What is worth knowing is the sting, the wearing-off, and the specific warning signs of toxicity.
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The injection stings briefly
The sting comes from the acidity of the solution rather than the needle. Buffering with bicarbonate, warming the solution and injecting slowly all reduce it noticeably.
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It may not work completely first time
Inflamed or infected tissue is acidic and resists local anaesthetic. More can be given, a different technique used, or the procedure rescheduled - nobody should proceed through pain.
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Numbness outlasts the procedure
Lidocaine lasts one to two hours, or longer with adrenaline; bupivacaine four to eight. Protect the area while numb - you cannot feel heat, pressure or a bitten lip.
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Local anaesthetic systemic toxicity
Rare but serious, from excessive dose or accidental injection into a vessel. Early signs are a metallic taste, tingling round the mouth, ringing ears and confusion. Report them immediately.
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True allergy is very rare
Genuine allergy to modern amide anaesthetics such as lidocaine is exceptionally uncommon. Most reported reactions are adrenaline effects or vasovagal faints, both of which are harmless.
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Adrenaline causes palpitations
A racing heart or shakiness for a few minutes after injection is an expected adrenaline effect, not an allergic reaction. It settles on its own.
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Bruising and bleeding
Small bruises at the injection site are common, more so on blood thinners. Adrenaline in the solution actually reduces bleeding during the procedure itself.
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Nerve injury is very rare
Temporary numbness or tingling can follow a nerve block and almost always resolves within weeks. Permanent injury is rare and is a recognised risk of regional rather than infiltration anaesthesia.
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Red flags after the procedure
Numbness that has not resolved after 24 hours, spreading redness, fever, or severe pain once the anaesthetic wears off - contact the clinic the same day.
Reading your procedure note
Your procedure note in four parts. Read the last one first.
Whatever was done under local anaesthetic, the note you are given afterwards keeps to the same shape.
A quiet reminder
Clinical language is precise and can read coldly - ask your care team to explain anything that is unclear.
Ask your care team to explain anything that is unclear.
- 01 Header
Indication and consent
What was being treated, what anaesthetic was chosen and why, and the risks discussed before you agreed to proceed.
- 02 Technique
Agent, dose and technique
Which anaesthetic was used - lidocaine, with or without adrenaline, or a longer-acting agent - the total dose, and whether it was infiltration or a block.
- 03 Findings
What was done and found
The procedure performed, any specimen sent for histology, and how the area looked at the time.
- 04 Impression
Aftercare and what to watch for
Read this first: how long numbness lasts, what to protect, what painkillers to take, and which signs mean you should call.
Recognised by major UK insurers
Local anaesthetic is almost never billed or considered separately by insurers - it forms part of the procedure fee. Where sedation or a regional block requires a consultant anaesthetist, that is billed as an anaesthetist fee and is usually covered when the underlying procedure is.
Frequently asked
Everything we get asked about local anaesthetic.
Quick answers on whether you feel anything, how long it lasts, driving afterwards, and how it compares with sedation.
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Will I feel the procedure?
You should feel pressure, movement and tugging, but not pain. That distinction matters - feeling something is normal, feeling pain is not. The clinician tests the area before starting and can add more anaesthetic at any point. If you feel a sharp sensation, say so immediately rather than enduring it.
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How long does local anaesthetic last?
Plain lidocaine numbs for one to two hours; adding adrenaline extends it to two to four. Longer-acting agents such as bupivacaine or ropivacaine last four to eight hours, and sometimes longer for a nerve block. Sensation returns gradually, often with pins and needles as it does.
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Can I drive afterwards?
After local anaesthetic alone, yes, in almost all cases - provided the numb area does not affect your ability to control the vehicle. After sedation, definitely not: you need an escort home and should not drive, sign documents or care for others for 24 hours.
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Do I need to fast beforehand?
No. Local anaesthetic requires no fasting, and eating normally beforehand actually reduces the chance of feeling faint during the procedure. Fasting is only needed if sedation or a general anaesthetic is planned.
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Am I allergic if I reacted at the dentist?
Probably not. True allergy to modern amide local anaesthetics like lidocaine is exceptionally rare. Most reported reactions turn out to be the adrenaline in the solution causing palpitations and shakiness, or a simple vasovagal faint. It is worth establishing which, since being labelled allergic unnecessarily limits future options.
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What is the difference between local anaesthetic and sedation?
Local anaesthetic numbs a specific area while you remain fully awake and aware. Sedation is a drug given intravenously that makes you drowsy and relaxed, usually with little or no memory of the procedure, but it does not remove pain - the local anaesthetic still does that. The two are frequently combined.
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Why did the injection sting so much?
The sting comes from the acidity of the solution rather than the needle itself, and adrenaline-containing preparations sting more. Buffering with sodium bicarbonate, warming the solution to body temperature and injecting slowly all reduce it substantially. Numbing cream applied beforehand removes the needle sensation entirely.
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What is local anaesthetic toxicity?
A rare but serious reaction when too much anaesthetic enters the bloodstream, either from an excessive dose or accidental injection into a vessel. Early signs are a metallic taste, tingling around the mouth, ringing in the ears, dizziness and confusion, progressing to seizures or cardiac effects. Clinics giving large volumes keep lipid emulsion available as the specific treatment.
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Why does adrenaline get added?
Adrenaline constricts small blood vessels, which keeps the anaesthetic in place for longer, reduces bleeding during the procedure and allows a lower total dose. It is avoided in some situations, though the old teaching about never using it in fingers, toes and noses has largely been revised.
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When should I call the clinic afterwards?
If numbness persists beyond 24 hours, if pain is severe once the anaesthetic wears off, or if you develop spreading redness, discharge or fever at the site. Immediately during or shortly after the procedure: a metallic taste, tingling around the mouth, ringing in the ears or confusion.
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