Most common cause: Ganglion cyst
These commonly appear on the wrist or top of the foot and are filled with joint fluid.
Typical features:
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Round or oval lump
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Smooth and firm (sometimes slightly soft)
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May change size
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Usually painless, but can cause discomfort or pressure
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Can hurt with movement or shoe pressure (foot)
What You Should Do
1️⃣ If it doesn’t hurt
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Monitor it
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Avoid pressing, squeezing, or “popping” it
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Wear comfortable shoes (if on foot)
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Use a wrist brace if it flares up
Many cysts shrink or disappear on their own.
2️⃣ If it hurts or limits movement
See a healthcare professional (GP or orthopedist).
Treatment options may include:
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Immobilization (brace or splint)
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Aspiration (draining the fluid with a needle)
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Cortisone injection
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Surgical removal (if persistent or recurring)
Note: Even after treatment, recurrence is possible.
🚫 What NOT to Do
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Don’t hit it with a heavy object (an old myth called “Bible therapy”)
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Don’t try to puncture it yourself
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Don’t ignore it if it becomes red, very painful, or rapidly enlarges
When to See a Doctor Urgently
Seek medical attention if:
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The area becomes red, hot, and very painful (possible infection)
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You have numbness or tingling
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It grows quickly
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You’re unsure whether it’s a cyst
Other Possible Causes
While ganglion cysts are most common, lumps can also be:
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Synovial cysts
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Lipomas (fatty lumps)
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Bone spurs
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Rarely, tumors
If you’re unsure, a doctor may use ultrasound or MRI to confirm.
If you’d like, tell me:
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Where exactly it is (top of foot? underside? back of wrist?)
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Is it painful?
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How long it’s been there?
I can give more specific guidance based on that.