Pilonidal Sinus Quiz

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Aiko Yoshioka, MD (Gastroenterology)

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Learn more about Pilonidal sinus

Content updated on Nov 2, 2022

What is pilonidal sinus?

This refers to a small hole or tunnel at the top of the buttocks at the cleft. It is generally harmless and goes unnoticed unless it becomes infected. The cause is not fully understood but may involve friction, hormones and hair growth. It is more common among men, young adults and people who sit down for long periods of time.

Symptoms of pilonidal sinus

  • Bumps containing pus

  • Sores or ulcers of the skin

Questions your doctor may ask to check for pilonidal sinus

Your doctor may ask these questions to diagnose pilonidal sinus

  • Do you have bumps on your skin with pus?

  • Do you have skin ulcers (sores)?

Treatment for pilonidal sinus

Pilonidal sinus only requires treatment in the case of infection, in which case, treatment depends on the severity of the infection. Mild cases may require antibiotics, while more severe cases require pus drainage and surgical removal.

View the symptoms of Pilonidal sinus


  • de Parades V, Bouchard D, Janier M, Berger A. Pilonidal sinus disease. J Visc Surg. 2013 Sep;150(4):237-47. doi: 10.1016/j.jviscsurg.2013.05.006. Epub 2013 Aug 1. PMID: 23911903.


  • Kober MM, Alapati U, Khachemoune A. Treatment options for pilonidal sinus. Cutis. 2018 Oct;102(4):E23-E29. PMID: 30489572.


  • Bi S, Sun K, Chen S, Gu J. Surgical procedures in the pilonidal sinus disease: a systematic review and network meta-analysis. Sci Rep. 2020 Aug 13;10(1):13720. doi: 10.1038/s41598-020-70641-7. PMID: 32792519; PMCID: PMC7426950.


Reviewed By:

Aiko Yoshioka

Aiko Yoshioka, MD (Gastroenterology)

From our team of 50+ doctors

Just 3 minutes.
Developed by doctors.

Ubie is supervised by 50+ medical experts worldwide

Shohei Harase

Shohei Harase, MD


Kameda Medical Center, Japan

Yu Shirai

Yu Shirai, MD


Yotsuya Yui Clinic, Japan

Yoshinori Abe

Yoshinori Abe, MD

Internal medicine

Co-founder of Ubie, Inc.

Rohini R

Rohini R, MD

Ear, nose, throat (ENT)

Bayshore Health Centre, India

Seiji Kanazawa

Seiji Kanazawa, MD, PHD

Obstetrics and gynecology (OBGYN)

National Center for Child Health and Development, Japan

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