Overview
A ganglion cyst (wrist/hand) is a noncancerous, fluid-filled sac that forms near a joint or tendon in the wrist or hand. It most often develops around the wrist, where it can feel like a firm or sometimes squishy lump that may change in size. While it is usually not dangerous, it can cause pain or aching by irritating nearby tissues or by affecting how tendons move. Symptoms vary depending on the cyst's size and its location relative to nerves and joint structures.
Symptoms
You may notice a rounded lump on the wrist or hand that can become more noticeable with activity and sometimes lessen with rest. Pain or tenderness may occur, especially with gripping, twisting, typing, or weight-bearing through the wrist. Some people feel stiffness in the wrist or discomfort that radiates around the joint. If the cyst presses on a nearby nerve, tingling, numbness, or weakness in the hand or fingers can occur.
Causes
Ganglion cysts form when joint or tendon tissue produces fluid that collects and creates a sac. The exact trigger is not always clear, but repetitive use, irritation, or minor trauma can contribute by stressing the joint capsule or tendon sheath. Over time, that fluid can build up and the cyst may intermittently enlarge or shrink.
Risk Factors
People who use their hands frequently-such as those in manual work or repetitive keyboard/mouse tasks-may be more likely to develop wrist ganglion cysts due to ongoing tissue irritation. Age-related wear around the wrist and previous joint or tendon problems can also increase risk. Having a cyst once can make it more likely to recur, even after it improves.
Prevention
While you cannot always prevent a ganglion cyst, you can reduce irritation by avoiding repetitive wrist positions that worsen symptoms. Using ergonomic tools, taking brief breaks during repetitive tasks, and maintaining wrist mobility and forearm flexibility may help lower stress on the joint and tendons. If an activity triggers symptoms, modifying technique or using a temporary wrist splint may reduce flare-ups.
How the Diagnosis Is Evaluated
Clinicians usually start with a history of when the lump appeared, whether it changes with activity, and what motions or positions make symptoms worse. A physical exam focuses on the lump's location, mobility, tenderness, and whether there are signs of nerve irritation like numbness or weakness. Imaging such as ultrasound is often used to confirm that the mass is cystic, and X-rays may be ordered to rule out arthritis or other bony causes. In some cases, MRI is considered if the diagnosis is uncertain or symptoms are atypical.
Nonsurgical Treatment Options
Many ganglion cysts improve with time, so observation is often reasonable when symptoms are mild. Activity modification, a short period of wrist immobilization with a splint, and anti-inflammatory medication (such as NSAIDs if appropriate for you) can help reduce pain and local irritation. Aspiration may be offered to drain the cyst, but it may not prevent recurrence because the fluid-producing tissue can remain. Corticosteroid injection after aspiration can reduce inflammation around the cyst, which may lessen pain and improve function, though recurrence can still occur. Your clinician will tailor treatment to the cyst's size, location, and how much it affects your wrist or hand function.
When to Seek Medical Attention
Seek prompt medical attention if the lump rapidly enlarges, becomes severely painful, or you develop redness, warmth, or fever. Get evaluated urgently if you have progressive numbness, weakness, or loss of hand function that suggests nerve involvement. Contact a clinician soon if the cyst interferes with daily activities, grip strength, or wrist motion and does not improve with basic measures. If you notice sudden, severe swelling after injury or you cannot use the hand normally, you should be assessed promptly.
Frequently Asked Questions
Yes, some ganglion cysts shrink or disappear without treatment, especially when irritation is reduced.
Aspiration can reduce size and symptoms, but recurrence is possible because the cyst's underlying tissue connection can persist.
Next Steps
If you have a new or changing lump on your wrist or hand-especially one that is painful or affects motion-schedule an evaluation with a clinician who can confirm the diagnosis. Ask whether observation, splinting, aspiration, or a corticosteroid injection fits your cyst's location and symptom severity. If you develop worsening numbness, weakness, fever, or rapidly increasing swelling, seek care sooner.