Itchy skin at joints is considered and eczema, neurodermatitis, atopic dermatitis and other diseases. 1. Eczema: the etiology of the disease is not yet clear, may be caused by immune abnormalities, mental, environmental and genetic factors, the patient will appear itchy, local erythema, papules, papules, vesicles, oozing and other symptoms, the whole body can appear. 2. Neurodermatitis: the etiology of neurodermatitis is not yet clear, may be neuropsychiatric, dietary and scratching, chronic friction and other factors. The patient’s skin will appear mossy changes, papules and other symptoms, mostly accompanied by itching, mostly in the neck, elbows, waist and other easy to scratch parts. 3. Atopic dermatitis: the common parts of the disease for the hands and feet, elbow and popliteal fossa and other places, the skin will appear dry, itchy and so on. The causes of this disease are mostly related to abnormal skin barrier function, heredity and immune abnormalities. There are many causes of itchy skin at the joints, and it is recommended that patients go to a regular hospital to get a clear picture of the cause of the disease.