Itchy red rashes on the face may be caused by seborrheic dermatitis, allergic inflammation, acne and other reasons. 1. Seborrheic dermatitis: usually due to abnormal sebum metabolism, an inflammatory rash that occurs on the face (especially on the eyebrows, nose and lips, perioral area, forehead, etc.). It can lead to red patches or papules on the facial skin, accompanied by itching and mild flaking symptoms. 2. Allergic inflammation: The use of allergic skin care products or cosmetics, contact with pollen or dust, sunlight or wind irritation can lead to allergic inflammation of the face, resulting in red patches, papules, pemphigus and other symptoms on the facial skin. At the same time, it will be accompanied by obvious itching symptoms. 3. Acne: When acne occurs repeatedly on the face, it is easy to secondary Propionibacterium acnes infection or oval Furfura spores infection, which leads to the appearance of consistent inflammatory papules on the facial hair follicles, and itchy symptoms can occur. At this time, one should pay attention to facial hygiene and avoid scratching the itchy places with hands to avoid aggravating the symptoms. At the same time, it is recommended to go to the dermatology department of the regular hospital, after clarifying the cause and diagnosis, to carry out targeted treatment, which can effectively alleviate the symptoms.