Flushing

Sudden, transient erythema and increased warmth of the skin, typically of the face, neck, or upper chest, due to vasodilation of cutaneous blood vessels. Possible causes are emotions (embarrassment, anger, anxiety, excitement), temperature, exercise, diet (hot beverages, spicy food, alcohol), medications (vasodilator), rosacea, menopause, hyperthyroidism, fever, carcinoid syndrome, mast cell activation syndrome, pheochromocytoma, and anaphylaxis.