How is hand eczema caused?

Hand eczema is a subtype of eczema, eczema is an allergic skin disease, its cause is very difficult to find, clinically to go through a variety of detection means, to find the cause, hoping to achieve the possibility of curing the disease. The cause of hand eczema can be found from external factors, internal factors. External factors: recent exposure to new things, or to new work, living environment; If you are not allergic before, you are showing allergies at present. This situation requires patch experiments to detect allergens. Internal factors: recent anxiety, changes in life patterns; or systemic diseases, acute diseases, surgery, etc. These conditions will cause immune system disorders and cause hand eczema. To find out how hand eczema is caused, it is mainly judged from external factors and internal factors.