Yes. A woman who finds a stain the size of a griss has to follow all the Halachos of a Nidah. However, if she finds the stain during her seven clean days, she only has to recount her seven clean days, not the initial five-day waiting period. It should be added that even if the stain is smaller than a griss the woman might be unclean like a regular Nidah. Therefore, a Rav should always be consulted. (see questions 4, 9, 12, 15, 18.)9. What is the Halachah if a woman finds a stain on her body or undergarments that is smaller than a griss?
As mentioned in question 4, there are authorities who say the woman is a regular Nidah. Therefore, a Rav should always be consulted even concerning a tiny speck of blood. (see question 10.)10. What is the Halachah if small stains of blood are found scattered around that are not attached?
If the size of the blood stains when combined equals at least the size of a griss, the Halachah differentiates between those scattered stains, which are found on a woman’s clothing and those which are found on her body. When the scattered stains are found on her clothes, each stain is judged individually and if they are each smaller than the size of a griss, the woman is clean and the blood is considered as the blood of an insect. When the scattered stains are found on her body, they are judged by their combined size. If when they are combined together they equal the size of a griss, the woman is a Nidah.14. What is the Halachah if a woman finds a stain on the toilet paper upon wiping herself after going to the bathroom?
It should be stressed that after a woman wipes herself, she should dispose of the toilet paper without looking at it. However, if she does look at it and sees a discoloration, she has to show it to a Rav since she may have the status of a Nidah.15.Does a stain always make a woman a Nidah no matter where on the clothing or body it is found?
No. There are many Halachos concerning the location of the stain and whether it causes the woman to become a Nidah in that particular location. There are also various other Halachos regarding stains; therefore, whenever a woman finds a stain anywhere on her clothing or on her body, she should consult a competent Rav.Next Chapter