Abstract: The types of skin manifestations in inflammatory bowel disease(IBD) patients include IBD specific skin manifestations,reactive skin manifestations,  the skin manifestations complicated  with  IBD and secondary skin manifestations of IBD related with other causes.Erythema nodosum and  pyoderma gangrenosum associated with IBD are commonly seen in ulcerative colitis，and skin abscesses and fistulas in Crohn disease. Some skin lesions may occur consequently,simultaneously or even before IBD diagnosis. Some skin lesions may indicate the development of IBD. The activity of IBD might have positive correlation with skin manifestations.Treatment of IBD skin lesions should be based on the control of IBD .Special therapy should be given according to the type of skin lesions.

Key words: inflammatory bowel diseases, skin manifestations; , erythema nodosum, pyoderma gangrenosum, fistula