Does tumah contracted from a niddah wear off or expire? Like a seat that she sat on? According to the times when the Temple stood? *edited

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    Are these two separate questions. 1- the actual person 2- Things a Niddah make tumah? Please clarify
    – Efraym
    Feb 26, 2021 at 14:21

1 Answer 1


As a general rule, Tumah does not wear-off an object - no matter how much time has passed.

If an object is badly decayed or been melted down or transformed into another object, then it sometimes loses its Tumah status.


In some Rabbinically decreed Tumah, like certain bloods and spittle, once it's dry it loses its Tumah status. This was decreed purposely to be able to differentiate between Rabbinic and Torah-ordained Tumah.

Regarding the Nidah herself, her Tumah status remains forever until she goes to Mikvah after keeping 7 clean days.

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