Objectives: Describing the clinical epidemiology, clinical features, laboratory data and treatment of dengue hemorrhagic fever (DHF) grades III in overweight and obese children. Material and Method: This is the case series study in DHF grades III in overweight and obese children from 2 to 15 year old treated at the Intensive Care Unit Dong Nai pediatric hospital from January 1st, 2004 to December 31st, 2008.Results: Male was 71.7%, most cases in obese children were from 5 to 9 year old and in overweight children were above 9 year old, 97.3% of cases hadn't fever at shock, 96.4% of cases went into shock on the 4th to 6th day of illness, petechiae was 98.2%, gastrointestinal bleeding was 5.3%.