Generalized itching can be seen in a variety of skin diseases, may be pruritus, atopic dermatitis, eczema and other diseases, but can not be used as a harbinger of certain diseases, the specific should go to the hospital to clarify. 1. Pruritus: Pruritus refers to only itchy skin, without primary lesions of a skin disease, mainly manifested as generalized or localized itching, the patient scratched the skin can appear scratches, scabs. 2. Atopic dermatitis: atopic dermatitis is a chronic, recurrent, inflammatory skin disease, clinically characterized by dry skin, intense itching, eczema-like rash. 3. Eczema: Eczema is a chronic, inflammatory, itchy skin disease, which is characterized by polymorphic rash, symmetrical distribution, tendency to ooze, and conscious itching. Eczema is easy to relapse, will seriously affect the quality of life of patients. It is recommended that when patients have symptoms of generalized itchiness, they can go to the hospital to clarify the cause of the disease and under the guidance of the doctor for treatment.