24 "When a person has a burn on his skin and the raw flesh turns into a reddish-white or white shiny spot, 25 the priest is to examine it. If the hair has turned white in the shiny spot and it looks like it's more than skin deep, a serious skin disease has erupted in the area of the burn. The priest will pronounce him unclean; it is a serious skin disease and infectious. 26 But if on examination there is no white hair in the shiny spot and it doesn't look to be more than skin deep but has faded, the priest will put him in quarantine for seven days. 27 On the seventh day the priest will reexamine him. If by then it has spread over the skin, the priest will diagnose him as unclean; it is a serious skin disease and infectious. 28 If by that time the shiny spot has stayed the same and has not spread but has faded, it is only a swelling from the burn. The priest will pronounce him clean; it's only a scar from the burn.
Matthew Henry's Commentary on Leviticus 13:24-28
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.