What Is a Cyst?

A cyst is a sac-like pocket of tissue that contains fluid, air, or other substances. Cysts can grow almost anywhere in your body or on your skin.

There are many different types of cysts. Most cysts are benign, or non-cancerous.

Whether a cyst needs treatment depends on a number of factors, including:

  • the type of cyst
  • the location of the cyst
  • if the cyst causing pain or discomfort
  • whether the cyst is infected

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