Abstract: Introduction: Behcet's Disease (BD) is characterized by recurrent attacks and remissions, making difficult the assessment of the treatment's result. Moreover, the remission period between the attacks is not the same and may vary from one attack to another. The attack periods are not always the same and may vary in severity, or extent of organ involvement. Iran Behcet's Disease Dynamic Activity Measure (IBDDAM) takes in account all of these parameters ...