Introduction
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What are ganglions?
Ganglions are small sacs (cysts) filled with fluid that often appear as bumps on the hands and wrists. They can also develop on feet, ankles, knees or shoulders. A ganglion can grow out of a joint capsule, which surrounds the joint, or a tendon sheath, which covers the tendon (fibers connecting muscle to bone). Ganglions aren’t cancerous.
Most people with ganglions notice the bumps appear suddenly. Bumps may range in size from very small to bigger than a cherry. Ganglions may get bigger as activity increases and more fluid collects in the sac. They may also shrink, break and go away on their own.
Anyone can get a ganglion, though they most often affect women between the ages of 15 and 50. Children don’t usually have ganglions. If they do, the ganglion will very likely go away without any treatment.
What causes them?
Experts don’t know the exact cause of ganglions. They may be linked to:
- Inflammation or irritation of the tendon sheath or joint capsule
- Injury
- Overuse or repetitive motions, such as those you do at work
- Arthritis
What are the symptoms?
Ganglions are usually small, painless bumps that do not cause other symptoms. Sometimes the bump can be tender to the touch, or there can be pain that gets worse with activity or pressure. If the ganglion puts pressure on nearby nerves, you may have tingling in your fingers, hand or forearm. Some ganglions can weaken your grip or affect joint motion.
How are they diagnosed?
A ganglion can usually be diagnosed based on how it looks and where it is. Your doctor will also feel the bump and shine a light alongside it. If the bump is a ganglion, the light usually shines through it. You may need an X-ray if your doctor suspects arthritis or injury. Some of the fluid found in the ganglion may be removed and examined. In rare cases, an MRI or ultrasound may be done.
How are they treated?
Ganglions usually don’t need treatment and often go away on their own. But treatment may be needed if the ganglion causes pain or other symptoms, limits what you can do, affects your bones or ligaments or gets infected. You may also want treatment if you’re bothered by how the bump looks.
Your doctor may treat a ganglion with:
- A wrist or finger splint
- Aspiration (draining the fluid from the bump with a needle)
- Hydrocortisone injections
- Surgery
Ganglions may come and go and may get bigger or smaller, with or without treatment.
How can you care for them yourself?
To care for a ganglion cyst on your own:
- Use a wrist or finger splint for several weeks. This may be all that’s needed for the ganglion to shrink and disappear on its own. Make sure the splint isn’t too tight. Numbness, tingling, pain or coolness in your hand are signs that you need to loosen the splint.
- Do not smash a ganglion with a book or other heavy object. You may break a bone or otherwise injure your wrist by trying this folk remedy, and the ganglion may return anyway.
- Do not try to drain the fluid by poking the ganglion with a pin or any other sharp object. You could cause an infection.
- If the ganglion breaks open on its own and the skin is broken:
- Cover the wound with a thin layer of petroleum jelly, such as Vaseline, and a nonstick bandage.
- Apply more petroleum jelly and replace the bandage as needed.
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