Leviticus 13:30

then the priest shall look on the plague; and, behold, if the appearance thereof be deeper than the skin, and there be in it yellow thin hair, then the priest shall pronounce him unclean: it is a scall, it is leprosy of the head or of the beard.

Leviticus 13:34-37

and in the seventh day the priest shall look on the scall; and, behold, if the scall be not spread in the skin, and the appearance thereof be not deeper than the skin; then the priest shall pronounce him clean: and he shall wash his clothes, and be clean.

Leviticus 14:54

This is the law for all manner of plague of leprosy, and for a scall,

Treasury of Scripture Knowledge

Summary

Then the priest shall see the plague: and, behold, if it be in sight deeper than the skin; and there be in it a yellow thin hair; then the priest shall pronounce him unclean: it is a dry scall, even a leprosy upon the head or beard.

Bible References

Scall

Leviticus 13:34
and in the seventh day the priest shall look on the scall; and, behold, if the scall be not spread in the skin, and the appearance thereof be not deeper than the skin; then the priest shall pronounce him clean: and he shall wash his clothes, and be clean.
Leviticus 14:54
This is the law for all manner of plague of leprosy, and for a scall,

American Standard Version Public Domain