The causes of eczema are often directly related to various allergic factors, poor lifestyle habits, autoimmune resistance and genetic factors. The reason for this is that it is not easy to find out if the environment is humid and causes eczema, but it depends on the individual. Some patients are in a humid environment for a long time, there will indeed be recurring eczema, and the reason for this may be that environmental humidity can easily lead to repeated breeding of bacteria and mold, and patients may be allergic to these microorganisms for a long time, leading to recurring eczema on the skin. There are also some patients who do not experience eczema symptoms in a humid environment for a long time, but may experience other clinical discomfort.