''Acne conglobata (AC) is an uncommon and unusually severe form of acne characterized by burrowing and interconnecting abscesses and irregular scars (both keloidal and atrophic), often producing pronounced disfigurement. The comedones often occur in...''
This picture of acne conglobata will give you a better understanding of such acne condition. The person affected by the acne is a 19-year-old male. You do not see his face, only his back with the acne conglobata.