Skin disorders that could become contagious required precautions to stop their spread. These included swelling, rashes, or discolored skin. Until healed, the person was ceremonially unclean. The diseases mentioned here had a broad range. These included allergic rash, ringworm, or eczema, as well as serious conditions like gangrene. In Old Testament times, people diagnosed skin conditions by observation. Priests served in religious and medical roles.
one of his sons: These priestly duties were meant for future generations of priests too.