My back itches. What kind of skin disease is this?

Diseases that need to be alert to back itching include localized itching, eczema, neurodermatitis, tinea corporis, insect bite dermatitis and so on. 1. localized pruritus: pruritus occurs in a certain part of the body, which is called localized pruritus. The disease has no primary rash, only itching symptoms, and secondary rashes such as scratching and scabbing can be seen locally. 2. Eczema: local skin itching is severe, and the rash in the acute stage is mainly herpes mound, which has a tendency to exudation; Lichen-like transformation is dominant in chronic stage. This disease is easy to recur. 3. Neurodermatitis: occurs in people who are nervous, anxious and emotional. Itching is serious, and the lesions are mainly lichen-like, which may be accompanied by scratches, scabs and pigmentation. 4 tinea corporis: it is an infectious disease caused by dermatophyte infection, local skin itching, clear boundary of skin lesions, common papules, papules, blisters and so on. There is mild inflammatory reaction at the edge and center of the lesion with desquamation. 5. Insect bite dermatitis: Mosquito bites on the back can cause itchy skin on the back, resulting in rashes such as erythema, papules and wheal. 6. Environment or clothing irritation: Environmental and clothing factors such as dry weather and clothing irritation may also be symptoms of itchy back. Some systemic diseases such as biliary obstruction, hyperthyroidism or hypothyroidism, diabetes, chronic renal insufficiency, lymphoma, etc. can also cause back itching. Therefore, patients with back itching should go to the hospital and be judged by doctors for timely treatment.