What is a ganglion cyst?

A ganglion cyst is a sac of thick, jelly-like fluid that arises from a joint or tendon sheath. The cyst is connected to the joint by a narrow stalk that acts as a one-way valve, fluid leaks out into the cyst but cannot easily return. This is why ganglions tend to change in size and rarely disappear completely without treatment, although a significant proportion (around 50%) do resolve spontaneously over months to years.

The most common location is the back of the wrist (dorsal ganglion), arising from the scapholunate joint. The next most common is the front of the wrist (volar ganglion), arising from the radiocarpal or scaphotrapezial joint. Other sites include the base of the fingers (flexor tendon sheath ganglion, or "seed ganglion") and the distal interphalangeal joint (mucous cyst, associated with osteoarthritis).

Ganglion cysts are entirely benign. They can sometimes cause aching with wrist activity, but most cause symptoms only because they are visible and patients understandably want to know what they are. The traditional treatment of striking the cyst with a heavy book is not recommended, it works in some cases but can fracture bones beneath the cyst.

Common causes

Idiopathic in most cases
Previous wrist injury or repetitive strain
Underlying joint pathology (e.g. arthritis for mucous cysts)
Joint capsule weakness or laxity

Who is at risk? Female sex and age 20-50 are the main demographic risk factors. Underlying arthritis (especially of the DIP joint) predisposes to mucous cysts. Ganglions in young athletes often follow repetitive wrist use.

Symptoms

Symptoms vary depending on the severity and duration of the condition. Common symptoms include:

A visible smooth, firm lump that may vary in size
Often painless, many patients only notice it cosmetically
Aching with wrist activity in some cases
Larger volar ganglions can press on the radial artery or median nerve
Mucous cysts can cause nail deformity if they press on the nail bed
Symptoms often correlate poorly with cyst size

When to seek help: See your GP or hand specialist if the lump is painful, growing rapidly, affecting hand function, or if you simply want a clear diagnosis and reassurance. Sudden change in a long-standing lump, or any pulsatile mass, warrants prompt review.

How is it diagnosed?

Your hand surgeon will take a detailed history and examine the hand and wrist. The following investigations may be arranged to confirm the diagnosis:

Clinical examination, smooth, fluctuant mass that transilluminates (glows when a torch is shone through it)
Assessment of any restriction in wrist or finger movement
Ultrasound, confirms a fluid-filled cyst and excludes solid masses
MRI, reserved for occult ganglions (deep, not visible) or atypical features
Aspiration, produces characteristic thick, clear, jelly-like fluid

Ultrasound is the imaging investigation of choice and rapidly confirms the diagnosis in atypical cases. A solid mass, rapidly growing lump, or pulsatile mass should not be assumed to be a ganglion, further imaging is essential.

Treatment pathway

Treatment is tailored to the severity of the condition, your age, activity level, and overall health. Most conditions are treated in a stepwise fashion, starting with the least invasive options.

First line

Reassurance and observation

Once the diagnosis is confirmed, the great majority of ganglions do not require treatment. Patients are reassured that ganglions are benign and that around half resolve spontaneously over 12-18 months. No restriction in activity is needed.

Second line

Aspiration

The cyst is drained with a needle, sometimes with a small injection of steroid afterwards. It works well for some ganglions, particularly dorsal wrist ganglions, but recurrence rates are high (around 50-70%). Volar wrist ganglions are not usually aspirated due to the proximity of the radial artery.

Surgical option

Surgical excision

Excision of the cyst together with its stalk and a small cuff of joint capsule, performed open or arthroscopically. Offered when the ganglion is painful, large, recurrent after aspiration, or significantly affecting function. Recurrence rates of 5-15% are typical.

Recovery

After aspiration most patients return to normal activity the next day, but the cyst frequently recurs. After surgical excision, the wrist is rested in a soft dressing for a few days, then gradually mobilised. Stiffness can be a problem if movement is not regained early, so hand therapy is sometimes recommended.

Reassurance only, spontaneous resolution: up to 12-18 months
Aspiration, return to activity: next day
Surgery, wound healing: 2 weeks
Full recovery after surgery: 4-6 weeks

What results can I expect?

Excellent. Ganglions are benign and do not transform into anything sinister. Surgical recurrence rates are 5-15% and are higher in occult ganglions and those treated previously. Mucous cysts may recur if the underlying DIP joint arthritis is not addressed.

In numbers

Most

are harmless[1]

ganglia are benign and never become cancerous

Dorsal

wrist most common[1]

followed by the volar wrist and finger flexor sheath

May

resolve on their own[1]

a proportion disappear spontaneously over time

Recurs

after aspiration commonly[1]

recurrence rates are higher after aspiration than after surgical excision

What the evidence shows

Ganglia are fluid-filled outpouchings from a joint capsule or tendon sheath containing thick, jelly-like mucinous fluid[1]

Treatment is usually not needed if the cyst is painless and not bothersome, reassurance is often all that is required[1]

Aspiration is straightforward but has a relatively high recurrence rate, surgical excision provides more durable removal but carries the usual surgical risks[1]

Volar (palmar side) wrist ganglia carry a slightly higher surgical risk because the radial artery is close to the cyst[1]

When can I…?

Typical activity timelines for this condition. These are approximate and vary considerably between patients. Always follow the specific guidance given by your surgeon and hand therapist.

Activity	Typical timeline	Notes
Drive	Same day or next	After aspiration when comfortable. After surgical excision, typically 3-7 days.[2]
Shower	After 24 hours (aspiration)	After excision, keep the wound dry until the dressing is removed (usually around 2 weeks).
Desk work	Same day or next	Light hand use is fine after aspiration. After excision, a few days off may be needed.
Manual work	2-4 weeks after excision	Heavy gripping waits until the wound has healed and movement is comfortable.[1]
Sport	4-6 weeks after excision	Return to sport as comfort and strength allow. Wrist-loading sports may be later.
Notice if it returns	Months to years	A proportion of ganglia return after aspiration. Returns after surgical excision are less common but possible.[1]

Is this normal?

Common concerns from patients with this condition or recovering from treatment, and whether they are expected or worth mentioning to your team.

Yes, this is common. A proportion of ganglia recur after aspiration. A return does not mean anything has gone wrong, it reflects the natural tendency of the cyst.[1]

It is worth assessing. Recurrence after surgical excision is less common than after aspiration but does happen. Sometimes a new lump is scar tissue rather than the cyst returning. Discuss with your team.[1]

Yes. Wrist stiffness in the first few weeks after ganglion excision is common, especially after volar (palm-side) ganglia. Movement returns gradually with hand therapy.[3]

Yes. Ganglia often fluctuate in size depending on activity, gripping, and even time of day. This is a feature of the cyst and not a cause for concern.[1]

References & further reading

References are to UK clinical guidance and patient information from recognised organisations. This page is for general information and does not replace personalised advice from your own clinical team.

Ganglion cyst