Eczema on buttocks may be related to genetic factors, endocrine changes, chronic infectious diseases and other factors. 1. Genetic factors: eczema has a certain genetic susceptibility, if the parents suffer from eczema, may make the next generation’s chances of disease increase, so that the situation of eczema on the buttocks. 2. Endocrine changes: menstrual disorders, pregnancy, etc. will lead to changes in hormone levels in the body, which may induce eczema. 3. Chronic infectious diseases: If you suffer from chronic cholecystitis, intestinal parasitosis, tonsillitis and other diseases, it may also induce diseases, resulting in eczema on the buttocks. The causes of eczema on the buttocks are more, it is recommended to go to the regular hospital to consult the examination, to clarify the cause of the disease.