A chronic, curable infectious disease principally causing skin injuries and nerve harm. Leprosy is brought about by contamination with the bacterium Mycobacterium leprae. It fundamentally affects the skin, eyes, nose and peripheral nerves. Side effects incorporate light-coloured or red skin patches with decreased sensation, deadness and weakness in hands and feet. Leprosy can be restored with 6-12 months of multi-sedate treatment. Early treatment maintains a strategic distance from inability. Leprosy otherwise called Hansen's disease, is an incessant infectious disease caused by Mycobacterium leprae. The disease predominantly influences the skin, the fringe nerves, mucosal surfaces of the upper respiratory tract and the eyes. Leprosy can be classified on the basis of clinical manifestations and skin smear results. In the classification based on skin smears, patients showing negative smears at all sites are said to have paucibacillary leprosy (PB), while those showing positive smears at any site are said to have multibacillary leprosy (MB).