Where a pilonidal sinus has become infected, the resulting pus will need to be drained from the abscess. This is achieved via surgery, where an incision is made to allow the pus to drain away.
In some cases, pilonidal disease may recur, in which case the affected area is excised (that is, removed by being cut out). A range of different surgical techniques can be used for this procedure.
It is not unusual for there to be healing issues with the resulting wound after pilonidal surgery. For this reason, an approach known as 'skin flap technique' is generally used to close the wound after surgery.