18 “When the body has a boil on its skin, and it has healed, 19 and in the place of the boil there is a white rising, or a bright spot, reddish-white, then it shall be shown to the priest; 20 and the priest shall examine it; and behold, if its appearance is lower than the skin, and its hair has turned white, then the priest shall pronounce him unclean. It is the plague of leprosy. It has broken out in the boil. 21 But if the priest examines it, and behold, there are no white hairs in it, and it isn’t deeper than the skin, but is dim, then the priest shall isolate him seven days. 22 If it spreads in the skin, then the priest shall pronounce him unclean. It is a plague. 23 But if the bright spot stays in its place, and hasn’t spread, it is the scar from the boil; and the priest shall pronounce him clean. 24 “Or when the body has a burn from fire on its skin, and the raw flesh of the burn becomes a bright spot, reddish-white, or white, 25 then the priest shall examine it; and behold, if the hair in the bright spot has turned white, and its appearance is deeper than the skin; it is leprosy. It has broken out in the burning, and the priest shall pronounce him unclean. It is the plague of leprosy. 26 But if the priest examines it, and behold, there is no white hair in the bright spot, and it isn’t lower than the skin, but is faded; then the priest shall isolate him seven days. 27 The priest shall examine him on the seventh day. If it has spread in the skin, then the priest shall pronounce him unclean. It is the plague of leprosy. 28 If the bright spot stays in its place, and hasn’t spread in the skin, but is faded, it is the swelling from the burn, and the priest shall pronounce him clean; for it is the scar from the burn. 29 “When a man or woman has a plague on the head or on the beard, 30 then the priest shall examine the plague; and behold, if its appearance is deeper than the skin, and the hair in it is yellow and thin, then the priest shall pronounce him unclean: it is an itch, it is leprosy of the head or of the beard. 31 If the priest examines the plague of itching, and behold, its appearance isn’t deeper than the skin, and there is no black hair in it, then the priest shall isolate him the person infected with itching seven days. 32 On the seventh day the priest shall examine the plague; and behold, if the itch hasn’t spread, and there is no yellow hair in it, and the appearance of the itch isn’t deeper than the skin, 33 then he shall be shaved, but he shall not shave the itch; and the priest shall shut him up who has the itch seven more days. 34 On the seventh day, the priest shall examine the itch; and behold, if the itch hasn’t spread in the skin, and its appearance isn’t deeper than the skin, then the priest shall pronounce him clean. He shall wash his clothes, and be clean. 35 But if the itch spreads in the skin after his cleansing, 36 then the priest shall examine him; and behold, if the itch has spread in the skin, the priest shall not look for the yellow hair; he is unclean. 37 But if in his eyes the itch is arrested, and black hair has grown in it; the itch is healed, he is clean. The priest shall pronounce him clean.

38 “When a man or a woman has bright spots in the skin of the body, even white bright spots; 39 then the priest shall examine them; and behold, if the bright spots on the skin of their body are a dull white, it is a harmless rash, it has broken out in the skin; he is clean. 40 “If a man’s hair has fallen from his head, he is bald. He is clean. 41 If his hair has fallen off from the front part of his head, he is forehead bald. He is clean. 42 But if there is in the bald head, or the bald forehead, a reddish-white plague; it is leprosy breaking out in his bald head, or his bald forehead. 43 Then the priest shall examine him; and, behold, if the rising of the plague is reddish-white in his bald head, or in his bald forehead, like the appearance of leprosy in the skin of the flesh, 44 he is a leprous man. He is unclean. The priest shall surely pronounce him unclean. His plague is on his head.

Matthew Henry's Commentary on Leviticus 13:18-44

Commentary on Leviticus 13:18-44

(Read Leviticus 13:18-44)

The priest is told what judgment to make, if there were any appearance of a leprosy in old sores; and such is the danger of those who having escaped the pollutions of the world are again entangled therein. Or, in a burn by accident, verse 24. The burning of strife and contention often occasions the rising and breaking out of that corruption, which proves that men are unclean. Human life lies exposed to many grievances. With what troops of diseases are we beset on every side; and thy all entered by sin! If the constitution be healthy, and the body lively and easy, we are bound to glorify God with our bodies. Particular note was taken of the leprosy, if in the head. If the leprosy of sin has seized the head; if the judgment be corrupted, and wicked principles, which support wicked practices, are embraced, it is utter uncleanness, from which few are cleansed. Soundness in the faith keeps leprosy from the head.