Pilonidal sinus

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Learn what causes a pilonidal sinus and how it can be treated.

Key points

  • A pilonidal sinus is an abscess near the top of the buttocks that occurs when hair is forced into the skin and the area becomes infected. It is more common in boys.
  • Usually your child will need surgery to open the abscess, drain the pus and remove the hair from the area. This will relieve the infection and help to relieve any pain.
  • Your child's wound should be cleaned and packed every day until it heals. You will get instructions for this.
  • Call your surgeon's office if your child has a fever or is vomiting or if there is more pain, redness, pus or swelling around the wound.
Last updated: November 19th 2013