At what point does spreading become a valid sign of impurity?
Halacha 2 states that spreading is not a sign of impurity unless it occurs after isolation. If the priest sees the blemish spreading at the initial examination, he isolates the person and waits — only subsequent spreading counts.
Question 2
Can a baheret spread into an existing boil and count as valid spreading?
Halacha 3 states that a baheret cannot spread into a boil, a burn, healed boil tissue, healed burn tissue, or onto the head or beard — only spreading into ordinary skin or a bohak counts.
Question 3
A person was isolated for two weeks with no signs, released as pure, and then their blemish spread slightly. What is the ruling?
Halacha 7 states that if a person was isolated week after week with no sign of impurity and then released, but after release the blemish spread even slightly, they are declared definitively impure (muchlat).
Question 4
When a person is declared impure because of both white hair and michyah, and the michyah then disappears, what happens?
Halacha 10 explains: if deemed impure due to two signs and one disappears, the person remains impure due to the remaining sign. They cannot become pure until all signs are simultaneously absent.
Question 5
A blemish was declared pure during isolation when all signs disappeared. Can it be isolated again?
Halacha 8 states that a baheret that was declared pure — whether during isolation or after having been declared definitively impure — because the signs of impurity disappeared, is never isolated again.