What is ganglion cyst?
A ganglion cyst is a smooth, fluid-filled swelling that arises from the lining of a joint or tendon sheath, filled with thick jelly-like fluid. The back of the wrist is the classic site, followed by the palm side of the wrist, the base of the fingers and the top of the foot. Ganglions are the most common lumps in the hand, are entirely benign, and often fluctuate in size. They can appear at any age but are most frequent in people between 20 and 50, and are more common in women.
Diagnosis is usually made on examination: the lump is smooth, may transilluminate when a light is shone through it, and sits at a typical site. Ultrasound or MRI is occasionally used to confirm the diagnosis or when the lump is atypical.
Common symptoms
- A smooth, rounded lump near a joint or tendon
- A swelling that changes size over time
- Aching or discomfort, especially with wrist movement
- Weakness or awkwardness of grip
- Tingling if the cyst presses on a nearby nerve
- Cosmetic concern about the lump's appearance
How long will you wait?
Because ganglions are harmless, NHS treatment is low priority and many areas restrict surgery to symptomatic cysts, so routine waits of several months from referral to excision are common, with around 34% of listed patients nationally waiting over 18 weeks.
Privately, you can typically see a hand specialist within 3–7 days, with aspiration often done at the first appointment and excision, if wanted, usually within 2–4 weeks.
NHS England median referral-to-treatment wait: 12.4 weeks, with 2.5 million people waiting over 18 weeks (May 2026). Individual waits vary by trust and urgency.
Treatment options
- Watchful waiting. Around half of ganglions disappear without any treatment, so observation is a genuinely reasonable first option.
- Aspiration. Drawing the fluid off with a needle can confirm the diagnosis and flatten the lump, though roughly half refill in time.
- Surgical excision. Removing the cyst together with its root from the joint gives the lowest recurrence rate, as open or keyhole day surgery.
What does private treatment cost?
As a guide, private aspiration typically costs around £250–£500, while self-pay surgical excision of a ganglion typically costs around £1,800–£3,000 depending on site.
Does health insurance cover ganglion cyst?
Private medical insurance generally covers assessment and removal of a ganglion when it is causing pain or functional problems and arose after the policy started. Removal purely for cosmetic reasons is not covered by any standard policy. If a previously treated ganglion recurs, insurers usually treat the recurrence as part of the same condition, which matters if it was originally excluded as pre-existing.
Frequently asked questions
Is a ganglion cyst dangerous?
No. Ganglions are benign fluid-filled swellings that never turn cancerous. The main reasons to treat one are pain, interference with grip or movement, pressure on a nerve causing tingling, or distress about its appearance. If a lump is hard, fixed, growing steadily or appeared after trauma, see a doctor to confirm the diagnosis, but typical ganglions can safely be left alone.
Should I hit a ganglion with a book?
The traditional 'Bible therapy' of smashing the cyst is genuinely not recommended. It can burst the cyst, but it is painful, risks injuring the surrounding joint, tendons and skin, and the ganglion commonly refills anyway. If you want it gone, aspiration or surgical excision by a specialist are safe, effective and considerably less dramatic options.
Will my ganglion come back after treatment?
It might. After aspiration, roughly half of ganglions refill because the sac and its connection to the joint remain. Surgical excision, which removes the cyst and its root, has a much lower recurrence rate, typically well under one in five. Even after recurrence, repeat treatment is straightforward, and some recurrent cysts settle on their own.
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