Neurodermatitis is a common chronic inflammatory skin disease characterized by episodic intense itching and lichenoid changes in the skin. The main causes are likely related to neuropsychiatric factors, diet, local skin irritation, gastrointestinal dysfunction, endocrine disorders, and many other factors. It has no relationship with fungi. If the skin is infected by fungi, common diseases include tinea capitis, tinea pedis, tinea unguium, tinea cruris, tinea corporis, and so on.