Leviticus 13:30

the priest shall examine the diseased place; if it appears to be deeper than the skin, with yellow, thin hair in it, the priest shall pronounce him unclean; it is a scale, it is leprosy of the head or beard.

Leviticus 13:34-37

Then on the seventh day the priest shall look at the scale; if the scale has not spread on the skin and appears to be no deeper than the skin, the priest shall pronounce him clean; he shall wash his clothes and be clean.

Leviticus 14:54

This is the law for any mark of leprosy—even for a scale,

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
Then on the seventh day the priest shall look at the scale; if the scale has not spread on the skin and appears to be no deeper than the skin, the priest shall pronounce him clean; he shall wash his clothes and be clean.
Leviticus 14:54
This is the law for any mark of leprosy—even for a scale,