How to judge allergy or eczema

Allergy is not a disease, it is a cause of disease, caused by allergies, there are many kinds of diseases, such as dermatitis, eczema, papular urticaria, neurodermatitis, urticaria, etc. may be caused by allergies, and eczema is only one of allergic diseases, is a variety of internal and external factors caused by skin inflammatory reaction, allergy to certain things outside is a cause of eczema. Therefore, allergy is a cause and eczema is a disease. The above health science knowledge is for reference only. The specific situation needs to be checked in a regular hospital and judged by a professional doctor. Do not diagnose or treat yourself.