Discovering a lump under your skin—especially on the wrist or foot—can be worrying. While it’s natural to feel concerned, most of these bumps turn out to be harmless cysts. Here’s what you need to know about them, when to seek medical advice, and how they can be treated.

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What Is a Cyst?

A cyst is a small sac beneath the skin filled with fluid or a thicker substance. Though the word may sound alarming, cysts are generally benign. They can form in many areas of the body, come in different sizes, and usually cause little or no pain.

Common Types of Cysts

• Sebaceous (Epidermoid) Cysts: Small, round lumps just beneath the skin, usually painless and filled with a thick, oily material. They often need no treatment unless they become inflamed or bothersome.

• Synovial Cysts: Found near joints such as the wrist, foot, knee, or hip. They may result from repetitive movement or injury and can sometimes resolve on their own. Painful or persistent ones may require minor surgery.

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When to Be Concerned

Most cysts are harmless, but certain warning signs should not be ignored. See a doctor if you notice:

• Redness or swelling (possible infection)

• Pain or tenderness

• Fever alongside a cyst

• Rapid growth or changes in shape

• Difficulty moving a joint near the cyst

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What to Do If You Find a Cyst

1. Don’t squeeze or pop it—this can lead to infection.

2. Monitor it—many small, painless cysts remain stable and need no treatment.

3. Seek medical advice if the cyst becomes painful, inflamed, or starts changing.

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Treatment Options

Treatment depends on the type and severity of the cyst:

• Drainage: A doctor may drain larger or infected cysts.

• Surgical removal: Recommended for cysts that persist or interfere with daily life.

• Medication: Antibiotics may be prescribed if infection is present.

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Prevention Tips

While cysts can’t always be prevented, you can reduce your risk by:

• Practicing good skin hygiene

• Avoiding skin trauma or repetitive strain on joints

• Keeping skin moisturized

• Wearing protective gear during repetitive activities

• Maintaining a balanced, nutrient-rich diet for healthy skin

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When to See a Doctor

Consult a healthcare provider if the cyst is painful, grows rapidly, becomes red or swollen, causes fever, or affects movement. Early evaluation ensures proper treatment and peace of mind.

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Bottom Line

Cysts are common and usually harmless, whether they appear on the skin or near a joint. While most require no treatment, being aware of concerning symptoms is key. If in doubt, consult a doctor to rule out complications and keep your health on track.