Pea sized hard lump on top of foot

Overview

Ganglion cysts are noncancerous lumps that most commonly develop along the tendons or joints of your wrists or hands. They also may occur in the ankles and feet. Ganglion cysts are typically round or oval and are filled with a jellylike fluid.

Small ganglion cysts can be pea-sized, while larger ones can be around an inch (2.5 centimeters) in diameter. Ganglion cysts can be painful if they press on a nearby nerve. Their location can sometimes interfere with joint movement.

If your ganglion cyst is causing you problems, your doctor may suggest trying to drain the cyst with a needle. Removing the cyst surgically also is an option. But if you have no symptoms, no treatment is necessary. In many cases, the cysts go away on their own.

Ganglion cyst care at Mayo Clinic

Symptoms

The lumps associated with ganglion cysts can be characterized by:

  • Location. Ganglion cysts most commonly develop along the tendons or joints of your wrists or hands. The next most common locations are the ankles and feet. These cysts can occur near other joints as well.
  • Shape and size. Ganglion cysts are round or oval and usually measure less than an inch (2.5 centimeters) in diameter. Some are so small that they can't be felt. The size of a cyst can fluctuate, often getting larger when you use that joint for repetitive motions.
  • Pain. Ganglion cysts usually are painless. But if a cyst presses on a nerve — even if the cyst is too small to form a noticeable lump — it can cause pain, tingling, numbness or muscle weakness.

When to see a doctor

See your doctor if you experience a noticeable lump or pain in your wrist, hand, ankle or foot. He or she can make a diagnosis and determine whether you need treatment.

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Causes

No one knows exactly what causes a ganglion cyst to develop. It grows out of a joint or the lining of a tendon, looking like a tiny water balloon on a stalk, and seems to occur when the tissue that surrounds a joint or a tendon bulges out of place. Inside the cyst is a thick lubricating fluid similar to that found in joints or around tendons.

Risk factors

Factors that may increase your risk of ganglion cysts include:

  • Your sex and age. Ganglion cysts can develop in anyone, but they most commonly occur in women between the ages of 20 and 40.
  • Osteoarthritis. People who have wear-and-tear arthritis in the finger joints closest to their fingernails are at higher risk of developing ganglion cysts near those joints.
  • Joint or tendon injury. Joints or tendons that have been injured in the past are more likely to develop ganglion cysts.

Ganglion cyst care at Mayo Clinic

Dec. 30, 2020

  1. De Keyser F. Ganglion cysts of the wrist and hand. http://www.uptodate.com/contents/search. Accessed Nov. 29, 2018.
  2. Frontera WR, et al. Hand and wrist ganglia. In: Essentials of Physical Medicine and Rehabilitation: Musculoskeletal Disorders, Pain, and Rehabilitation. 3rd ed. Philadelphia, Pa.: Saunders Elsevier; 2015. http://www.clinicalkey.com. Accessed Nov. 29, 2018.
  3. Ferri FF. Ganglia. In: Ferri's Clinical Advisor 2019: 5 Books in 1. Philadelphia, Pa.: Elsevier, 2019. http://www.clinicalkey.com. Accessed Nov. 29, 2018.
  4. Ganglion cysts. American Society for Surgery of the Hand. http://www.assh.org/handcare/Hand-Anatomy/Details-Page/articleId/27970. Accessed Nov. 29, 2018.
  5. Ganglion cyst. American College of Foot and Ankle surgeons. http://www.foothealthfacts.org/conditions/ganglion-cyst. Accessed Nov. 29, 2018.
  6. Amadio PC (expert opinion). Mayo Clinic, Rochester, Minn. Nov. 9, 2015.

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Pea sized hard lump on top of foot

As you go about your life, you can develop irritating growths on your feet and ankles that cause you discomfort or pain. These growths can have different causes, but frequently they’re non-cancerous soft-tissue masses.

According to board-certified podiatrist Thomas Rambacher, DPM of Mission Viejo, California-based Podiatry Hotline Foot & Ankle, ganglion cysts are one of the most common soft tissue lumps that occur on your foot and ankles. While not usually dangerous, these cysts can cause pain and impact your daily functioning.

Understand what’s behind foot and ankle ganglion cysts, and what to do if you discover one on your foot.

What is a ganglion cyst?

Ganglion cysts are a type of fluid-filled sac you can get on your foot or ankle, as well as other joints throughout your body. They occur when your ligaments and joints secrete fluid.

You can get a ganglion cyst on the top or bottom of your foot, and the cysts can vary in size from small to large. Ganglion cysts are non-cancerous and not typically dangerous, but they can cause pain.

Causes of ganglion cysts

It’s not known exactly what causes ganglion cysts to form. However, it’s hypothesized these are some of the likely reasons you might get a ganglion cyst on your ankle or foot:

  • Injury or trauma to your foot or ankle
  • Repetitive stress on your foot or ankle area
  • Irritation to your nearby tendons or joints

Ganglion cyst symptoms

Many of the symptoms of a ganglion cyst are similar to other soft tissue masses. If you have any of the following symptoms, make an appointment with our doctors at Podiatry Hotline Foot & Ankle to clarify which type of cyst you have.

  • A noticeable lump on the top or bottom of your foot or ankle.
  • A dull ache or pain near the lump, which can mean your cyst is pushing on a ligament or tendon.
  • A tingling or burning sensation, which can indicate your cyst is pushing on a nerve.
  • Irritation to the lump when you wear shoes.

In general, you’re more likely to have a ganglion cyst if you have some or all of these symptoms and are in your 20s to 40s. Women are also more likely to get ganglion cysts than men. 

Treating your ganglion cyst

While ganglion cysts are rarely serious, you should always get any unusual lump on your foot evaluated at Podiatry Hotline Foot & Ankle. Dr. Rambacher and his team can perform an examination to find the cause and recommend the best treatment course.

If your ganglion cyst isn’t causing you pain and isn’t interfering with your quality of life, you might not need any treatment, and the cyst might go away on its own. In these cases, our team continues to monitor your ganglion cyst and can help you find footwear that doesn’t irritate your cyst.

When the ganglion cyst is painful or makes it hard to move around, our team can usually remove the cyst through a nonsurgical procedure. This involves draining the fluid from your cyst using steroid medication that helps shrink the remainder of the cyst.

If you suspect you have a ganglion cyst or another kind of soft tissue mass on your foot or ankle, make an appointment at Podiatry Hotline Foot & Ankle online or by calling 949-916-0077.

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Can a lump on top of foot be cancer?

They may or may not hurt or cause changes in daily activity. But a lump found in the foot has a possibility of being cancerous, and for this reason, must not be ignored. The most common type of lump found in the foot is a soft-tissue mass called a ganglionic cyst.

What is a hard pea sized lump?

Skin Cysts Cysts can appear anywhere on your body and may look and feel like a small, hard pea. The most common causes of cyst formation include clogged oil glands, infections, and a growth that develops around a foreign body such as an earring or navel ring.

What is bony lump on top of foot?

Bone spur. Bone spurs, or osteophytes, are small, bony growths that occur near damaged joints. Sometimes, they can appear on the top of the foot and become visible through the skin. A common cause of bone spurs is osteoarthritis.

Are ganglion cysts hard like bone?

Ganglion cysts are soft, gel-like masses that often change size. They tend to be smooth and round, and are: the most common type of swelling in the hand, wrist and foot. harmless and can safely be left alone.