When it's infected, a pilonidal cyst becomes a swollen mass (abscess). Signs and symptoms of an infected pilonidal cyst include:

  • Pain
  • Reddening of the skin
  • Drainage of pus or blood from an opening in the skin
  • Foul smell from draining pus

When to see a doctor

If you notice any signs or symptoms of a pilonidal cyst, see your doctor. He or she can diagnose the condition by examining the lesion.

Dec. 05, 2012

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