All depends. You do not stated if this is a new or recurrent disease, the treatment is different among this two important problems. If new,  just drain the abscess, remove completly the hair involved and curette the lesion base (which is really important in pilonidal disease is to assure to remove completly the sinus lesions along the gluteal  cleaft), it will do. If the disease is present with fistulous complication, unroof the fistula tract and curette the lesions, it Will do. With multiple recurrences, and extended lesions I would rather go for a more radical procedure like a Dufourmentel advancetment flap or triple L advancement flap which in the Long run has demonstrated the least recurrent rate. As a said at the very beginning, in pilonidal disease, all depends. With small and comfined lesions go conservative, with extended and multiple recurrent disease, go radical.