Ganglion Cysts of the Wrist and Hand
By Mr Gavin Schaller FRCS(Tr&Orth) | Consultant Hand & Wrist Surgeon | Reviewed July 2026
In short: A ganglion cyst is a harmless fluid-filled swelling that arises from a joint or tendon sheath, most often on the back of the wrist. A ganglion is not a tumour and many disappear without any treatment. When a ganglion is painful or interferes with function, the options are continued observation, aspiration with a needle or surgical removal. Surgery gives the lowest chance of the cyst returning.
What is a ganglion cyst?
A ganglion cyst is a fluid-filled sac that grows from the lining of a joint or a tendon sheath. The cyst is filled with a thick, clear jelly-like fluid similar to the fluid that lubricates joints. A ganglion is connected to the joint or tendon beneath it by a small stalk, which is the reason a ganglion can change in size and often refills if the fluid alone is drained.
Ganglion cysts are the most common lump found in the hand and wrist. The NHS describes them as harmless, and a ganglion is not cancerous and does not turn into anything dangerous. Ganglia are most frequent in people between the ages of 20 and 40 and are more common in women, though a ganglion can appear at any age.
Where do ganglion cysts appear?
Ganglion cysts appear most often on the back of the wrist. Around 6 in 10 ganglia form on the back of the wrist over a specific joint between two of the small carpal bones, and these are called dorsal wrist ganglia. The next most common sites are the front of the wrist on the thumb side, the base of a finger on the palm side and the last joint of a finger near the nail.
A ganglion at the last finger joint is called a mucous cyst and is linked to underlying wear in that joint. A small ganglion on the flexor tendon sheath at the base of a finger, sometimes called a seed ganglion, can be surprisingly tender when gripping despite being no bigger than a pea.
What causes a ganglion cyst?
The exact cause of a ganglion cyst is not fully understood, but a ganglion is thought to form when the tissue around a joint or tendon bulges out and fills with joint fluid. Repeated stress on the joint may play a part, which is why a ganglion sometimes appears after a period of heavy or repetitive wrist use, though many ganglia arise with no clear trigger at all.
In the wrist itself, ganglion formation is closely linked to the small ligaments that connect the carpal bones. Gradual wear and degeneration of these interosseous ligaments — most often the ligament between the scaphoid and lunate bones on the back of the wrist — is thought to provoke low-grade inflammation in the joint lining. The inflamed lining produces more of the thick lubricating fluid, which is forced out through a small weakness in the joint capsule and collects to form the cyst. A one-way valve effect at the stalk lets fluid pass into the cyst but not easily drain back, which is why a wrist ganglion tends to enlarge over time and refills after the fluid is simply drawn off. This degenerative origin is also why dorsal wrist ganglia are so common at the scapholunate joint and why removing the cyst without addressing its stalk allows it to return.
A ganglion is not caused by any serious underlying disease in most cases. The main exception is the mucous cyst at the end joint of a finger, which is associated with osteoarthritis in that joint. Knocking a ganglion or a previous wrist injury does not reliably cause a ganglion and there is no evidence that keyboard use or manual work directly creates one.
What are the symptoms of a ganglion cyst?
The main symptom of a ganglion cyst is a visible or palpable lump that is smooth, firm and rounded. A ganglion is usually attached to the deeper tissue rather than the overlying skin, so the skin moves freely over it. Other features include:
A lump that changes size, often growing with activity and shrinking with rest
A dull ache or discomfort in the wrist, made worse by movement
Weakness of grip when the ganglion is large or awkwardly placed
A cyst that is soft or hard depending on how tense it is with fluid
No redness or heat, as a ganglion is not an infection
Many ganglia cause no symptoms at all beyond the appearance of the lump. Pain, when it occurs, comes from the pressure of the cyst on nearby structures or from the underlying joint rather than the cyst itself. A ganglion that shines when a light is held against it in a dark room, called transillumination, helps confirm that the lump is fluid-filled rather than solid.
How is a ganglion cyst diagnosed?
A ganglion cyst is usually diagnosed by clinical examination alone, without the need for scans. The typical location, the smooth rounded feel, the way the lump transilluminates and its tendency to change size are characteristic enough that most ganglia can be identified in clinic.
An ultrasound scan is occasionally used to confirm the diagnosis when a lump is small, deep or in an unusual position, and to distinguish a ganglion from other causes of a wrist lump. An MRI scan is rarely needed but can be helpful for an occult ganglion, which is a small deep cyst causing pain without an obvious lump. Investigation matters most when the diagnosis is uncertain, because a small number of hand lumps are not ganglia and need to be assessed on their own terms.
When should I see a hand surgeon about a ganglion?
You should see a hand surgeon when a ganglion is painful, is growing, is affecting the use of your hand or when you are simply unsure what the lump is. A ganglion is harmless, so treatment is a matter of choice rather than necessity in most cases, but a professional assessment is worthwhile in these situations:
Pain or aching that interferes with work, sport or sleep
A lump that is enlarging or changing in character
Weakness, numbness or tingling, which can occur if a ganglion presses on a nearby nerve
A ganglion at the end joint of a finger with changes in the nail
Any lump you are worried about or that does not behave like a typical ganglion
Numbness or tingling alongside a wrist lump deserves prompt review, as pressure on a nerve is one of the few reasons a ganglion needs more urgent attention. This pattern is different from carpal tunnel syndrome, though the two can occasionally occur together.
What treatment options are available for a ganglion cyst?
There are three main approaches to a ganglion cyst: observation, aspiration and surgical removal. The right choice depends on how much the ganglion is bothering you rather than on the size of the lump alone.
Observation. Doing nothing is a reasonable and common choice. Many ganglia disappear on their own over months or years, and a painless ganglion carries no risk from being left alone. Reassurance that the lump is harmless is all that many patients need or want.
Aspiration. Aspiration involves drawing the jelly-like fluid out of the cyst with a needle and syringe, usually under local anaesthetic in clinic. Aspiration is quick and avoids surgery, but because the stalk connecting the cyst to the joint remains, the ganglion returns in around half of cases. Aspiration suits patients who want to avoid an operation and accept that the cyst may come back.
Surgical removal. Surgery, called ganglion excision, removes the cyst together with its stalk and a small cuff of the joint capsule it arises from. Removing the stalk is what gives surgery the lowest recurrence rate of the three options.
What happens during ganglion cyst surgery?
Ganglion cyst surgery removes the whole cyst and its stalk through a small incision. The operation is usually performed as a day case under sedation & regional anaesthetic, or general anaesthetic, and takes around 30 to 45 minutes depending on the site and size of the ganglion.
Through an incision over the cyst, the ganglion is traced down to the joint or tendon sheath it grows from. The cyst and its stalk are removed along with a small portion of the surrounding capsule, which reduces the chance of the ganglion reforming. The wound is closed with sutures and the wrist is bandaged, sometimes with a light splint for comfort in the first few days.
What is recovery like after ganglion removal?
Recovery after ganglion removal is usually straightforward, with most people back to normal daily activities within two to six weeks. The exact timeline depends on the site and size of the ganglion.
The first week focuses on keeping the hand elevated to control swelling, keeping the dressing dry and gentle finger movement to prevent stiffness. Discomfort is usually mild and settles quickly.
Weeks two to six are when movement and strength return. The sutures are removed at around 10 to 14 days. A hand therapist may guide exercises to restore full wrist movement, particularly after surgery on the back of the wrist where some stiffness is common early on. Most patients return to desk-based work within a week or two and to manual work and sport by around six weeks.
The scar can stay firm and sensitive for a few months and scar massage helps. Recurrence after surgical removal is lower than after aspiration, in the region of 5 to 15% in published series, which is considerably better than the roughly 50% recurrence seen with aspiration alone. Full wrist movement is regained in the large majority of patients.
My approach to ganglion cysts
I see a great many wrist and hand lumps across my Hertfordshire and London practice, and the majority turn out to be simple ganglia. My first job is to confirm the diagnosis and to reassure, because most patients who come in worried about a lump are reassured to learn that a ganglion is harmless and often needs no treatment at all.
When a ganglion is painful or limiting, I talk through observation, aspiration and surgery honestly, including the recurrence figures for each, so the decision fits what matters to you rather than a fixed protocol. If a lump does not behave like a typical ganglion, I investigate it properly rather than assume.
I assess and treat ganglion cysts at Spire Bushey Hospital, One Hatfield Hospital and Pinehill Hospital in Hertfordshire, and from September 2026 at London Bridge Hospital, with consultations at London Sports Orthopaedics at 31 Old Broad Street in the City of London. A consultation will confirm what the lump is and, if anything needs doing, which option suits your hand and your circumstances.
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Frequently asked questions about ganglion cysts
Are ganglion cysts dangerous? No. A ganglion cyst is harmless and is not cancer. A ganglion is a fluid-filled swelling from a joint or tendon sheath and does not spread or turn into anything sinister. The only reasons to treat a ganglion are pain, weakness, pressure on a nerve or the appearance of the lump. Any lump you are unsure about is still worth having checked.
Can a ganglion cyst go away on its own? Yes. Many ganglion cysts disappear on their own over months or years without any treatment. A painless ganglion can safely be left alone and simply watched. There is no benefit to treating a ganglion that is not causing symptoms, so observation is often the most sensible choice.
Should I hit a ganglion with a book to make it burst? No. The old remedy of striking a ganglion with a heavy book is not recommended. Hitting a ganglion can bruise the hand, damage nearby structures and rarely provides a lasting result because the stalk remains and the cyst refills. Aspiration or surgery are the safe and effective ways to treat a ganglion.
Does draining a ganglion cyst cure it? Not usually. Draining a ganglion with a needle, called aspiration, removes the fluid but leaves the stalk connecting the cyst to the joint. Because the stalk remains, the ganglion returns in around half of cases after aspiration. Surgical removal of the cyst and its stalk gives a much lower chance of the ganglion coming back.
How long does ganglion surgery take to recover from? Recovery after ganglion surgery usually takes two to six weeks. Most patients return to desk work within one to two weeks, with sutures removed at around 10 to 14 days. Manual work and sport generally resume by six weeks. Some stiffness and scar sensitivity can persist for a few months and hand therapy helps restore full movement.
Will a ganglion cyst come back after surgery? Sometimes. Recurrence after surgical removal of a ganglion is in the region of 5 to 15%, which is much lower than the roughly 50% recurrence after aspiration. Removing the stalk and a small cuff of joint capsule is what reduces the chance of the ganglion reforming. A recurrent ganglion can be treated again if it causes symptoms.
Is a lump on my wrist always a ganglion? No. A ganglion is the most common wrist lump, but not every lump is a ganglion. Other causes include tendon-sheath swellings, fatty lumps and, rarely, more serious growths. A lump that is firm and fixed, growing steadily or associated with other symptoms should be assessed. Ultrasound or a clinical examination will usually establish what a lump is.
Can a ganglion cause nerve problems? Yes, occasionally. A ganglion that presses on a nearby nerve can cause numbness, tingling or weakness. This is more likely with a ganglion on the palm side of the wrist or at the base of the palm. Nerve symptoms alongside a wrist lump are one of the clearer reasons to seek a hand surgeon's opinion rather than wait.
Mr Gavin Schaller FRCS(Tr&Orth), Consultant Hand & Wrist Surgeon The Schaller Hand & Wrist Clinic About Mr Schaller
This article is for general information only and is not a substitute for a consultation with a qualified clinician. If you have concerns about your hand or wrist, please seek medical advice.
