A red face can be caused by a variety of diseases, disorders and
conditions. Skin infections and
conditions like rosacea
, acne and
eczema can cause redness of face. Any allergy, inflammatory conditions like vasculitis, sunburn, and allergies to foods, insect bites can cause redness of face.Fever,alcohol,COPD,polycythaemia vera can cause flushed face. Sweating, fainting can be due to hypoglycaemia, thyroid hormone imbalances, anxiety, heart problems like angina etc.