The treatment of diabetes mellitus patient who had periodontal abscess requires a careful management and good cooperation with an internist. Periodontal abscess management technique on diabetic patient is not quite different from other periodontal diseases nevertheless the dentist needs to complete examination, mainly blood glucose level must be checked, pre and post treatment. The objective of this report is to know the result of periodontal abscess management in uncontrol diabetic patient aged 55 years by flap approach technique, it showed satisfactory result two months after treatment.