Sudden burning of the face may be caused by contact dermatitis, rosacea, trigeminal neuralgia, etc. 1. Contact dermatitis: For example, the use of cosmetics of unknown composition, skin care products and other products may cause contact dermatitis, resulting in a sudden burning of the face. 2. Rosacea: A persistent flushing reaction on the face can occur after changes in environmental temperature, exposure to hot beverages, alcohol, and spicy foods, often accompanied by dryness, burning, or tingling sensations in the skin. 3. Trigeminal neuralgia: Trigeminal neuralgia may lead to the facial innervation area, sudden intense, radiating pain, which may also lead to sudden burning of the face. Sudden burning of the face, there may be other reasons, need to go to the hospital in time to check the cause.