**Shortened & Simplified Version (under 200 words):**

If you find a small lump under your skin—like on your wrist or foot—it’s natural to worry, but it might just be a harmless cyst.

**What’s a cyst?**
“A cyst is simply a sac that forms under the skin and is filled with fluid or a thicker material.” They vary in size, often aren’t painful, and usually pose no health risk.

**Should you worry?**
Most cysts are non-cancerous. They might feel odd or get irritated, especially if near joints, but they’re rarely dangerous.

**Common types:**

* *Skin cysts* (sebaceous or epidermoid): Usually small, painless, and need no treatment.
* *Synovial cysts*: Found near joints like the wrist or knee; caused by movement or injury. Some go away on their own, but surgery may be needed if painful.

**When to see a doctor:**
If the cyst is red, swollen, painful, or you have a mild fever, it could be infected. “Prompt medical attention is important.”

**Prevention tips:**
While not all cysts can be avoided, healthy eating, sun protection, and gentle skincare may help.

**Bottom line:**
“Be mindful, not fearful.” Most lumps are harmless, but checking with a doctor is always smart.