Why is perianal eczema chapped?

Perianal eczema will appear blisters or pustules, blisters rupture can cause perianal wet discomfort, perianal skin mucosa in a humid environment for a long time, prone to chapped. Suggestions: topical glucocorticoid cream and immunomodulators and other drugs, while oral anti-allergic drugs, vitamins, nerve function modulation drugs treatment