John Dummelow's Commentary on the Bible - Leviticus 13:1-59
Uncleanness connected with LeprosyIt is tolerably certain that the leprosy of the OT. is not the leprosy of the Middle Ages, which is still to be found in the East. The latter is a terrible and loathsome disease, called elephantiasis, in consequence of which the skin thickens, the features are distorted, and the very limbs mortify and drop off from the body. The leprosy of the Bible is a skin disease, known as psoriasis, in which the skin and hair grow white, and which is accompanied with scab... read more
Expository Notes of Dr. Thomas Constable - Leviticus 13:2-8
Serious skin disease apparently began with some sort of swelling or a shiny patch on the skin (Leviticus 13:2). Serious skin disease resulted in uncleanness, but less important conditions might not. read more