Charles Ellicott Commentary Leviticus 13:24

"Or when the flesh hath in the skin thereof a burning by fire, and the quick [flesh] of the burning become a bright spot, reddish-white, or white;" — Leviticus 13:24 (ASV)

Or if there be any flesh, in the skin whereof there is. —Rather, or if there is in the skin of the flesh. As a burn or inflammation arising from contact with pitch or hot water was mentioned in Leviticus 13:18, the verse before us specifies a sore, pustule, or blister occasioned by “a burning of fire,” as the Margin of the Authorized Version rightly has it, and not a hot burning, as it is in the text. The ancient canons distinctly define this by “that which is burnt with a coal or with embers, whatever is from the force of actual fire, is the burning here meant,” in contradistinction to the burn or inflammation mentioned in Leviticus 13:18.

And the quick flesh that burneth. —Rather, and the sound flesh of the burning , that is, the tender flesh which is renewed (after it has lost the purulent matter in it) and exhibits these symptoms.