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Health condition · Clinically reviewed

Ganglion cyst, observation, aspiration - and when surgery makes sense.

The commonest soft-tissue lump of the wrist and hand. Benign, often painless and frequently self-resolving - but sometimes worth treating.

Companion guides: ganglion and ganglion cysts - the same clinical entity described in slightly different ways.

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Why trust this guide

  • 01

    Clinically reviewed

    Written by our editorial team and reviewed by a registered UK clinician before publication.

  • 02

    Sourced from guidance

    Checked against BSSH, BOA and peer-reviewed hand and orthopaedic sources you can see at the end.

  • 03

    Current for 2026

    Reflects modern UK practice on observation, aspiration and arthroscopic or open excision.

Key facts

Ganglion cyst at a glance.

The essentials, in plain English - what it is, where it appears, and how it is managed in UK hand and orthopaedic clinics.

  • What it is

    A benign, fluid-filled swelling next to a joint capsule or tendon sheath, containing thick, jelly-like synovial-type fluid.

  • Most common site

    The wrist - dorsal (top) and volar (palm-side) ganglion cysts together account for the majority of lesions.

  • Other locations

    Finger (mucous or digital myxoid cyst), flexor tendon sheath (seed ganglion), foot, ankle and knee (Baker cyst is a related variant).

  • Cause

    Not fully understood - probably a small defect in the joint capsule or tendon sheath letting fluid herniate and form a one-way pouch.

  • First-line care

    Reassurance and observation - many ganglion cysts settle on their own over months to years.

  • When to treat

    Persistent pain, functional limitation, nerve pressure or cosmetic concern - aspiration or surgical excision are the mainstays.

Why this guide matters

A benign lump, a measured plan.

Not every ganglion needs a needle or a knife. The three points below shape the rest of this page.

  • It is almost always benign

    Ganglion cysts are not tumours - the vast majority need reassurance and time rather than urgent intervention.

  • Treat symptoms, not the lump

    A cyst is worth treating when it hurts, limits function or presses on a nerve - not simply because it is there.

  • Recurrence is honest ground

    Whether by aspiration or surgery, ganglion cysts can return - realistic expectations make treatment choices easier.

How the diagnosis is made

From a new lump to a clear plan.

The steps a UK GP or hand surgeon will normally follow, in order - so you know what to expect and why.

  1. 01

    Assessing

    History and site

    Where the lump appeared, how quickly it grew, whether it changes in size and what movements make it worse.

  2. 02

    Assessing

    Focused examination

    Soft, smooth, round swelling adjacent to a joint or tendon - typically transilluminates because of its clear fluid content.

  3. 03

    Assessing

    Functional check

    Range of motion, grip strength and nerve function - especially important for volar wrist and dorsal foot cysts.

  4. 04

    Confirming

    Ultrasound scan

    Confirms a cystic (rather than solid) lesion, defines its origin and rules out other soft-tissue lumps.

  5. 05

    Confirming

    MRI if diagnosis unclear

    Reserved for occult (hidden) wrist ganglia, deep cysts or when a solid lesion cannot be excluded on ultrasound.

  6. 06

    Deciding

    Shared decision

    Agree a plan - watchful waiting, aspiration or surgery - based on symptoms, function and personal preference.

  7. 07

    Deciding

    Refer if concerning

    Rapid growth, fixed or hard swelling, skin change or pulsatile lesion needs a same-week specialist opinion.

Typical timeline: a first visit to a settled plan in one to two appointments.

Symptoms

What a ganglion cyst actually looks like.

A soft, smooth lump next to a joint or tendon - most often the wrist. The variants below describe where it appears and how it behaves.

  • Round, smooth swelling

    A soft or firm lump immediately over a joint or tendon - most often the back of the wrist.

  • Changes in size

    Classically fluctuates - larger with activity, smaller with rest. May disappear briefly and return.

  • Transilluminates

    A small torch pressed against the lump lights up because the fluid inside is clear - a helpful bedside clue.

  • Ache with activity

    Discomfort when gripping, pressing or loading the wrist, hand or foot rather than at rest.

  • Wrist ganglion

    Dorsal cysts arise from the scapholunate area; volar cysts sit near the radial artery and need careful assessment.

  • Digital myxoid cyst

    A small clear or bluish nodule at the base of the fingernail from underlying distal interphalangeal joint osteoarthritis.

  • Seed ganglion

    A small, pea-sized cyst on a flexor tendon sheath in the palm - tender when gripping a steering wheel or handlebar.

  • Red flag - nerve pressure

    Pins and needles, weakness or altered sensation beyond the lump suggests a nerve is being compressed and needs review.

Treatment

How ganglion cysts are treated in the UK.

Reassurance and observation first, aspiration or a splint next - and surgical excision reserved for painful, recurrent or troublesome cysts.

  • Watchful waiting

    Reassurance, activity modification and time - many ganglion cysts settle spontaneously, especially in younger patients.

  • Splinting or bracing

    A short-term wrist splint can settle a painful, activity-related cyst by resting the underlying joint.

  • Simple analgesia

    Paracetamol or a short course of a topical or oral anti-inflammatory helps day-to-day discomfort.

  • Ganglion aspiration

    A clinic-based needle drainage under local anaesthetic - quick, low-risk and useful, though recurrence is common.

  • Cortisone injection

    A steroid injection at the base of the cyst or into an inflamed neighbouring joint can settle pain and, occasionally, the cyst itself.

  • Arthroscopic excision

    Keyhole surgery for dorsal wrist ganglia - the cyst and its stalk are removed with small skin incisions and minimal scarring.

  • Open surgical excision

    The gold-standard operation for volar wrist, digital and recurrent cysts - the whole cyst and its root are removed.

  • Physiotherapy

    Grip, wrist and hand rehabilitation before and after treatment - protects function and reduces recurrence.

What this guide is based on

The sources behind every claim on this page.

UK national guidance and specialist society standards, current at the time of last review.

Key references

Guidelines and standards we relied on.

A quiet reminder

This guide is for information, not medical advice.

Your GP or hand surgeon knows your history and can tell you which parts apply to you. If in doubt, get seen.

  • British Society for Surgery of the Hand (BSSH). Patient information on ganglion cysts of the hand and wrist.

  • British Orthopaedic Association (BOA). Guidance on benign soft-tissue swellings.

  • NICE Clinical Knowledge Summaries. Ganglion cyst overview.

  • Royal College of Surgeons of England. Commissioning guide: painful ganglion and hand pathology.

Red flags

When a lump needs urgent attention.

Most ganglion cysts are benign and manageable. These are the features that mean something else - and a specialist opinion is needed.

  • Rapid growth

    A lump doubling in size in weeks - especially if hard or fixed - needs ultrasound and specialist review to exclude a soft-tissue tumour.

  • Nerve compression

    Numbness, weakness or altered sensation beyond the swelling - carpal or ulnar tunnel-type symptoms from a wrist ganglion need urgent assessment.

  • Pulsatile lump near the wrist

    A volar wrist swelling that pulsates raises the possibility of a vascular lesion rather than a ganglion - do not aspirate blindly.

  • Overlying skin change

    Redness, warmth, tethered skin or discharge - suggests infection or something other than a simple cyst.

  • Locking, catching or triggering

    When a hand lump changes joint or tendon mechanics - the ganglion may be pressing on structures that need to be released.

  • Post-injury swelling

    A new lump after a fall or fracture needs imaging - to distinguish a ganglion from a bony injury or occult fracture.

  • Recurrent after surgery

    A ganglion that returns after two excisions - reconsider the diagnosis and the surgical approach with a hand specialist.

  • Solid or hard lesion

    Ganglion cysts are soft or fluctuant - a hard, immobile or bony lump on examination needs imaging before any injection or aspiration.

  • Systemic symptoms

    Fever, weight loss or night sweats alongside a soft-tissue lump - rare but a signal for prompt investigation.

Living with it

A benign lump, with a sensible plan.

Four things that make the biggest difference day to day - reassurance, activity adjustments, treating symptoms rather than the lump, and honest expectations about recurrence.

A quiet reminder

Not every lump needs a needle.

A painless, non-restrictive ganglion cyst is safe to observe - watchful waiting is a legitimate, evidence-based plan.

  1. 01 Reassure

    Most are harmless

    A ganglion is a benign cyst - not a tumour, not cancer, and not caused by hitting it with a book.

  2. 02 Adapt

    Modify aggravating activity

    Ergonomic changes to keyboard, mouse and grip often reduce discomfort more than any injection.

  3. 03 Choose

    Treat symptoms, not the lump

    A painless ganglion rarely needs anything more than reassurance - treatment is for pain, function or nerve pressure.

  4. 04 Expect

    Recurrence is possible

    Even after excellent surgery a ganglion can recur - understanding this upfront helps set expectations.

Frequently asked

Everything we get asked about ganglion cysts.

Quick answers on wrist ganglia, aspiration, surgery and what to expect afterwards.

  • What is a ganglion cyst?

    A ganglion cyst is a benign, fluid-filled swelling next to a joint capsule or tendon sheath. It contains thick, jelly-like synovial-type fluid and most commonly appears on the back or palm side of the wrist, though it can occur on the fingers, palm, foot, ankle or knee.

  • Are ganglion cysts and ganglia the same thing?

    Yes - ganglion cyst, ganglion and ganglion cysts are the same clinical entity described in slightly different ways. Our companion guides at /conditions/ganglion/ and /conditions/ganglion-cysts/ cover the same condition and share the same evidence base.

  • Do ganglion cysts need to be removed?

    Not usually. A ganglion that is painless and not restricting movement can safely be left alone - many disappear on their own. Aspiration or surgery is reserved for cysts that hurt, limit function, press on a nerve or cause significant cosmetic concern.

  • Is aspiration a permanent fix?

    Not always. Needle aspiration is quick, low-risk and effective in the short term, but the recurrence rate is high - between one in three and two in three patients. It is a reasonable first step, especially if surgery is not desired.

  • Should I hit my ganglion with a book?

    No. The old "Bible therapy" of striking a cyst is not recommended - it risks bruising, fracture and injury to nearby nerves or vessels, and any short-term flattening usually returns.

  • What is the recovery like after surgery?

    After open or arthroscopic excision most people are back to light activities within one to two weeks and full activity by six to eight weeks. Some stiffness and mild scar tenderness are normal, and hand therapy is often helpful.

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