The purpose of the
hefsek taharah, the daily
bedikot during the
seven clean days, and wearing white underwear, is to confirm that the bleeding has actually stopped. So yes, under normal circumstances we definitely want to know what is going on during the seven clean days.
On the other hand, in a case of need (such as when a woman is experiencing problematic staining, especially if this is a frequent occurrence), there is room to be lenient about disregarding stains, even during the clean days. The
laws of stains are a
rabbinic stringency added on to the Torah laws of
niddah. Chazal did not intend for staining to unnecessarily burden women and cause them to constantly be
niddah, so there are leniencies built into these laws. Thus, a flow of blood, or staining with
hargashah, is certainly problematic on a Torah level and would interrupt the clean days. A flow of blood or a
hargashah may not be ignored. But if the bleeding is staining rather than a flow, and not accompanied by
hargashah, a woman may take advantage of the leniencies of
ketamim (stains) in order to disregard the staining and complete the clean days.
While
l'chatchila (ideally) one should perform two
bedikot daily during the seven clean days,
b'dieved (after the fact, or in a situation of significant need) one
bedikah each on days 1 and 7 is sufficient. Therefore omitting the
bedikot in the middle does not invalidate a set of clean days. A woman who experiences difficulty completing the clean days may take advantage of these leniencies and reduce the number of
bedikot, or skip
bedikot when she suspects she is staining. This is not a
l'chatchila situation, but exists
b'dieved& to help those who need it.
There is no halachic requirement to check one's toilet paper, so even during the clean days one may avoid looking for stains on the
toilet paper.
Please feel free to get back to us with any further questions.