When itchy erythema appears on the nose, the first principle is to stop using all kinds of facial cleanser, skin care products and cosmetics. When itchy erythema appears on the nose, you can't scratch it. It is not advisable to scald it with overheated water to avoid drinking. Pay attention to sun protection when itchy erythema appears on the nose. Go to the hospital as soon as possible to make a clear diagnosis that itchy erythema on the nose is often caused by skin inflammatory diseases such as allergies, eczema dermatitis and early psoriasis. If you find such a problem, you need to go to the dermatology department for diagnosis, and the itchy erythema on the nasal skin should be treated according to the cause. If the skin of the nose is allergic to itching and erythema, you need to use anti-allergic drugs; If the itchy erythema on the nasal skin is eczema dermatitis, you can use antipruritic ointment, or use medicine under the guidance of a doctor; If the itchy erythema on the nasal skin is early psoriasis, targeted treatment is needed.