What causes redness and itching

Red and itchy face may be caused by physiological factors such as skin dehydration, or it may be caused by certain diseases such as allergies and seborrheic dermatitis.
1. Skin dehydration: when the skin is seriously dehydrated, it will lead to dryness and impaired barrier function, resulting in red and itchy face.
2. Allergic diseases: ① cosmetic allergy: skin contact with a cosmetic, skin damage in the contact area, is a contact dermatitis. ② food, inhalant allergy: after eating river food, seafood, inhalation of dust mites and other allergenic substances lead to allergies, red itchy face.
3. Seborrheic dermatitis: If the patient has inflammatory skin diseases, such as seborrheic dermatitis, it will lead to recurrent erythema of the skin on the face, greasy scabs with itching, and the phenomenon of red and itchy face will occur.
If there is a red and itchy face, it is still recommended to consult a doctor in time, follow the doctor’s instructions, get timely treatment, do not treat yourself or use medication.