The causes of neurodermatitis are not yet fully understood. It is generally believed to be related to several factors: 1. Neuro-psychiatric factors, such as irritability, anxiety, tension, sadness, fatigue, insomnia, etc.; 2. Local skin irritation, for example, friction from shirt collars, desks, contact with chemical substances, localized infections, sweat soak, localized sun exposure, etc.; 3. Dietary factors, such as drinking alcohol, consuming spicy foods, seafood, and other potential triggers; 4. Gastrointestinal dysfunction; 5. Endocrine disorders, and more. These reasons may contribute to the development of neurodermatitis.