Chronic eczema can be applied to the affected area with Chinese patent medicine such as black bean distilled oil ointment. Eczema, known as wet sores in Chinese medicine, is a recurring allergic inflammatory skin disease. The treatment of eczema often applies internal medicine with external treatment. Commonly used external proprietary Chinese medicines include black bean distillate ointment. Black bean distillate ointment has the effect of anti-inflammatory, astringent, antipruritic, can be used for neurodermatitis, subacute, chronic dermatitis and chronic eczema. Occasionally see irritation reaction after external use, or light sensitization reaction; allergic to the product is prohibited; pay attention to the skin with broken, vesicles running or pus shall not be used; should not be used for a long time, a large area. The above proprietary Chinese medicines need to be used by a traditional Chinese medicine practitioner after diagnosis, avoid self-medication, so as to avoid adverse consequences.