Alena Hoover

A 70-year-old female with past medical history diabetes mellitus, hypertension, hyperlipidemia, dementia presents from nursing home with acute unilateral swelling along the left side of her face. She is breathing comfortably but seems to experience significant pain at the associated site of swelling. Vitals include T38.5, HR 102, BP 150/90, SpO2 98% on room air. On examination, she has erythema and tenderness overlying her left parotid gland. Massaging the gland causes expression of purulent material. What is the diagnosis?