Nishmat's Women’s Health and HalachaIn memory of Chaya Mirel bat R' Avraham

  • Hebrew
  • English
  • Espnaol
  • Francais
  • donate
Side Bar

Stains on body

31 July, 2017


If one uses black underwear, the stain will not show on the underwear, however it may show in the groin (next to the underwear). Does that render one nidah?


Stains on the body, on the inner thigh or inside of the legs, can make a woman niddah if their combined area is larger than a gris (roughly, the area of an American dime or Israeli shekel).

Whereas we judge the size of each individual stain on a garment independently, on the body we assess the cumulative area of all stains.  When the cumulative area of stains on the body is a gris or less, the stains do not make a woman niddah.

In evaluating the size of a single stain extending from the body and onto a colored undergarment (of any color, not only black), only the part of the stain that is on the body is taken into account.  

When the size is larger than a gris, the color of the staining is decisive.  A light brown with no hint of a reddish tint does not make a woman niddah.  A red, pink, or black stain would, as would some other browns.  If the niddah status of the color is unclear to her, a woman can transfer staining (to the extent possible) to a piece of toilet paper or white cloth, and have that color evaluated by a halachic authority.  In contrast, the size is best evaluated by the woman observing the stain on her body.

For more information, please see our site's article on Stains.  Please write back with any further questions.

This internet service does not preclude, override or replace the psak of any rabbinical authority. It is the responsibility of the questioner to inform us of any previous consultation or ruling. As even slight variation in circumstances may have Halachic consequences, views expressed concerning one case may not be applied to other, seemingly similar cases. All health and health-related information contained within Nishmat's Women's Health & Halacha Web site is intended to be general in nature and should not be used as a substitute for consulting with your health care professional. The advice is intended to offer a basis for individuals to discuss their medical condition with their health care provider but not individual advice. Although every effort is made to ensure that the material within Nishmat's Women's Health & Halacha Web site is accurate and timely, it is provided for the convenience of the Web site user but should not be considered official. Advice for actual medical practice should be obtained from a licensed health care professional.

For further questions or comments: 

The Nishmat Women's Health and Halacha Site is a public service of Nishmat, The Jeanie Schottenstein Center for Advanced Torah Study for Women. This project and others like it are made possible by contributions from people like you. If you have benefited from the service, and wish to enable us to help others, click here to donate.

Users of Internet filtering services: This site discusses sensitive subjects that some services filter without visual indication. A page that appears 100% complete might actually be missing critical Jewish-law or medical information. To ensure that you view the pages accurately, ask the filtering service to whitelist all pages under

Accessibility Toolbar