Ganglions can vary from the size of a small pea to the size of a golf ball.

What Are Ganglions?

A ganglion is a fluid filled swelling of the lining of a joint or tendon. Although ganglions can form on any part of the ankle or top of the foot, they most often appear on the ankle or top of the foot. Ganglions tend to change in size and usually grow very slowly.


Repeated irritation can weaken the lining of a joint or tendon and lead to ganglions. People who wear boots are more vulnerable to ganglions, as this type of footwear puts stress on the foot and ankle. Bone spurs (boy outgrowths) may also cause ganglions by irritating the joints and tendons.


Ganglions often form with no symptoms. But if ganglions puts pressure on the nerves in the overlying skin, it can cause tingling, numbness, or pain. Ganglions sometimes swell and their size can change with different activities or a change in the weather.

How Are They Diagnosed?

Because ganglions are sometimes mistaken for tumors, it’s important to have a complete examination and possibly, tests to confirm the diagnosis.

Medical History

Your podiatrist asks you quests such as how long you’ve had the ganglion, what kind of symptoms you’re feeling, if it has changed in size, or if its size varies according to your activities.

Physical Exam

During your evaluation, your podiatrist may do a translumination exam, shining a light though the swelling (usually, you can see through a ganglion, but not through a tumor). When your foot is palpated (pressed), a ganglion feels spongy and the fluid moves from side to side.


If a bone spur is suspected, x-rays may be needed. Fluid removal (needle aspiration) may be done to help determine the degree of swelling and to decrease pain. To confirm a ganglion, magnetic resonance imaging (MRI) may be done, which reveals images of soft tissue and bone. Sometimes, special dyes may be injected into the area to show the outcome of a ganglion. Fluid withdrawn from the ganglion may reveal the severity of the swelling and decrease pain.

How Are Ganglions Treated?

Ganglions are often difficult to treat without surgery– but not nonsurgical methods may be helpful in relieving some of your symptoms.

Nonsurgical Care

  • Pads placed around the ganglion can ease friction.
  • Fluid removal may also relieve symptoms, though ganglions may recur.
  • Icing the ganglion for 15-20 minutes may temporary relive inflammation and pain.
  • If your inflammation is severe, your podiatrist may treat your symptoms with medication.

Will I Need Surgery?

If a ganglion is causing ongoing or severe pain, your podiatrist may recommend surgery. The entire ganglion wall is removed during the procedure; some surrounding tissue may also be removed.

After Surgery

You may feel pain, swelling, numbness, or tingling for several weeks following surgery. You’ll probably be able to walk soon afterward, though your foot may need to be wrapped or in a cast. Be sure to see your podiatrist if you notice any problems in the future. Although surgery is usually successful, there is a chance that the ganglion will recur.

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