Treatment of abscess is incision and drainage, betadine packing, noninflammatory drugs and antibiotics.
These cyst might become infected in long standing cases which will present with features similar to an abscess.
Treatment include removal of the cyst along with its sac. Draining of the cyst will lead to recurrence of the cyst as the sac is the gland itself and it will continue secreting the sebum. Infected sebaceous cyst needs incision and drainage and antibiotics and NSAIDs. After resolution of inflammation cyst removal is done.