Where it develops
A pilonidal sinus usually appears as a small opening or tunnel beneath the skin near the top of the buttock cleft. It may go unnoticed until infected.
Symptoms to have assessed
A painful swelling, blood or pus discharge, and recurring infections need assessment. Sitting may become painful if an abscess develops.
Planning treatment
Treatment depends on whether infection is present and symptoms recur. Managing an abscess and operating on a persistent sinus may involve separate stages.
General information only. It does not replace an individual diagnosis, treatment plan or medical consultation. This is a pre-publication editorial draft and is not presented as medically reviewed content.