There are some problems in classifications relating to interface dermatitis/ lichenoid tissue reaction. All these classifications in literature are broader and according to infiltrate pattern and type, which fails to come to the conclusion of individual skin diagnosis. Further the term LTR and IFD are overlapping and not clearly separated by present system of classification. These classifications are not able to explain the actual differentiation of LTR/ lichenoid dermatitis from other dermatosis like MF, histiocytosis, etc. To add to confusion disease showing epidermotropism like MF has been included in the classification as a cell poor IFD. These classifications are not involving the other interface changes seen in skin biopsies of Hansen’s disease etc. Lichenoid infiltrate changes seen in skin malignancies like bowen’s disease, basal cell carcinoma, paget’s disease, etc. are also included under the terminology of “IFD”. This study will redefine the true features of IFD and put a new classification by combining the older classifications as well as will try to put sub classification. Further this study will separate the true IFD from lichenoid tissue reaction and secondary interface changes seen in other skin conditions