Itchy skin is the most common pruritic skin disease in clinical practice. These pruritic skin diseases are most likely to be formed by allergies, the most common of which may be urticaria, which not only forms an itchy body, but also a certain rash, which mainly manifests itself in the form of wind and red spots. It is possible that the patient may have atopic dermatitis of the skin, or papular urticaria formed due to mosquito bites, both of which may cause itching of the skin. Of course, these allergies can lead to the formation of localized allergic inflammatory lesions on the skin. It is possible that the patient has a certain infection of the skin, which can be seen as a bacterial infection as well as a viral or fungal infection, so that it can lead to secondary skin damage, so that a certain itching symptom may also occur at this time.