Ganglion Cysts: What to Know About That Lump on Your Wrist or Hand

A ganglion cyst is a common, non-cancerous lump that usually forms near a joint or tendon.

They are most often seen around the wrist, hand, fingers, foot or ankle. In many cases, they are harmless and may not cause pain, but they can become uncomfortable if they press on nearby joints, tendons or nerves.

Ganglion cysts can vary in size. Some stay small, while others become more noticeable over time. They may also change size depending on activity.

What Is a Ganglion Cyst?

A ganglion cyst is a fluid-filled lump that forms near a joint or tendon. The fluid inside the cyst is usually thick and jelly-like. It is similar to the fluid that normally helps lubricate joints and tendons.

In simple terms, a small pocket of fluid forms under the skin and creates a visible or palpable lump. More technically, ganglion cysts often arise from the joint capsule or tendon sheath. They are benign, meaning they are not cancerous and do not spread to other parts of the body.

Common locations include:

• Back of the wrist

• Front of the wrist

• Base of the fingers

• Finger joints

• Top of the foot

• Ankle

  
  

Why It Happens

The exact cause of a ganglion cyst is not always clear. They may develop when fluid from a joint or tendon sheath collects and forms a small sac. This can sometimes be associated with repetitive loading, previous injury, joint irritation or local tissue changes. Ganglion cysts are commonly seen in people who use their wrists and hands regularly for work, sport, gym training, typing, gripping or repetitive tasks. In some cases, they appear without a clear reason.

Signs and Symptoms

Common signs and symptoms of a ganglion cyst include:

• A visible lump near a joint or tendon

• A lump that may change size

• Aching or discomfort with movement

• Pain with gripping, loading or weight-bearing

• Reduced wrist, hand, foot or ankle movement

• Pressure or tightness around the joint

• Tingling, numbness or weakness if the cyst presses on a nerve

Some ganglion cysts are completely painless and are only noticed because of their appearance.

Diagnosis and Imaging

A ganglion cyst is usually diagnosed with a clinical assessment.

Your clinician may assess the size, location, tenderness, movement, strength and whether the lump changes with joint position or activity.

In some cases, imaging may be used to confirm the diagnosis or rule out other causes of a lump. This may include ultrasound, X-ray or MRI.

Imaging may be more likely if the lump is painful, growing, unusually firm, located in an uncommon area, associated with trauma, or causing nerve symptoms.

Treatment Options

Treatment depends on the size, location and symptoms of the cyst. Many ganglion cysts do not need treatment, especially if they are painless and not affecting movement or function. Some may reduce in size or go away on their own over time.

Treatment options may include:

• Monitoring the cyst if it is not painful

• Activity modification to reduce irritation

• Splinting or bracing for short-term symptom relief

• Aspiration, where the fluid is drained with a needle

• Surgical removal if symptoms are persistent or significantly affecting function

  
  

Aspiration can help reduce the size of the cyst, but ganglion cysts can return. Surgery may be considered if the cyst is painful, keeps coming back, affects movement, presses on a nerve, or interferes with work, sport or daily activity.

How Physio Helps

Physiotherapy can help when a ganglion cyst is painful, affecting movement, or limiting function.

A proper assessment is the first step. Your physio will look at joint movement, strength, loading tolerance, grip strength, wrist or ankle control, work tasks, gym exercises and daily activities that may be contributing to symptoms.

Physio treatment may include:

• Activity and load management

• Wrist, hand, foot or ankle mobility exercises

• Strengthening around the affected joint

• Grip strengthening where appropriate

• Advice on bracing or splinting

• Ergonomic and technique advice

• Return-to-gym, work or sport planning

• Post-operative rehab if the cyst has been surgically removed

  
  

Physio does not “pop” or remove the cyst, but it can help reduce irritation, improve movement, restore strength and manage the factors that may be making symptoms worse.

If surgery has been required, physiotherapy can also help restore mobility, reduce stiffness, rebuild strength and guide a safe return to normal activity.

Other Possible Causes

Not every lump around the wrist, hand, foot or ankle is a ganglion cyst. Other possible causes include:

• Lipoma: A soft, fatty lump under the skin.

• Carpal boss: A bony lump on the back of the wrist or hand.

• Giant cell tumour of the tendon sheath: A firm lump that forms around a tendon sheath.

• Epidermoid cyst: A small cyst under the skin, often related to blocked skin cells or previous minor trauma.

• Arthritic swelling: Joint enlargement or swelling related to osteoarthritis or inflammatory arthritis.

• Bursitis: Inflammation of a fluid-filled sac near a joint.

• Neuroma or nerve swelling: A nerve-related lump or irritation that may cause tingling, burning or numbness.

• Infection or abscess: A painful, red, warm or swollen lump that may require urgent treatment.

• Fracture or bony injury: A lump or swelling after trauma that may be related to a bone injury.

• Soft tissue tumour: Rare, but any unusual, fast-growing, painful or unexplained lump should be assessed.

  
  

When to Get Help

You should consider getting a lump assessed if it is painful, growing, affecting movement, limiting work or sport, causing numbness or tingling, or has appeared after an injury.

Urgent medical review is recommended if the area is red, hot, very painful, rapidly increasing in size, associated with fever, causing significant weakness, or if there are changes in skin colour or sensation.

Many ganglion cysts are harmless, but it is still important to confirm the diagnosis and understand the best management option for your situation.

If you are dealing with a painful ganglion cyst, wrist lump, hand lump, foot lump or ongoing joint pain, the team at Urban Physiotherapy in North Sydney can assess your movement, guide your rehab and help you return safely to work, gym and sport.