Generic term applied to a variety of skin disorders from psoriasis to true leprosy. Its symptoms ranged from white patches on the skin to running sores to the loss of digits on the fingers and toes.
For the Hebrews it was a dreaded malady that rendered its victims ceremonially unclean-that is, unfit to worship God (Lev 13:3). Anyone who came in contact with leper was also considered unclean. Therefore, lepers were isolated from the rest of the community so that the members of the community could maintain their status as worshipers. Other physical disorders or the flow of certain bodily fluids also rendered on unclean (Lev 12:1-14:32; 15:1-33). Even houses and garments could have “leprosy” and, thus, be unclean (Lev 14:33-57).
Jesus did not consider this distinction between clean and unclean valid. A person’s outward condition did not make one unclean; rather that which proceeds from the heart determines one’s standing before God (Mark 7:1-23; cp Acts 10:9-16). Therefore, Jesus did not hesitate about touching lepers (Mark 1:40-45) and even commanded His disciples to cleanse lepers (Matt 10:8). Jesus even made a leper the hero of one of His parables (Luke 16:19-31).