In Shia Jaʿfari jurisprudence, hayd is the technical term for menstruation as a ritual state. It is not synonymous with “any vaginal bleeding.” Bleeding becomes hayd only if it meets a tight set of conditions, all of which a Shia woman following Ayatollah A. Sistani is responsible for assessing.
What makes bleeding hayd
Per A. Sistani’s Islamic Laws (4th edition):
- Minimum duration: three continuous days. Bleeding shorter than three days is not hayd. It is istihada (A. Sistani 438).
- Maximum duration: ten days. Bleeding longer than ten days is partly hayd and partly istihada; the partition follows further rules (A. Sistani 438).
- Continuity: the first three days must be continuous; if bleeding stops on the eve of day 2 or day 3, the run does not qualify as hayd (A. Sistani 439).
- Tuhr gap: at least ten days of purity must pass between two hayd cycles. A second bleed sooner than that is istihada, not a new hayd (A. Sistani 492).
- Physical signs: hayd blood is typically warm, dark or bright red, and emerges with pressure. These signs help disambiguate when chronology is unclear (A. Sistani 432).
What hayd means for worship
A woman in hayd:
- Does not pray the five daily prayers, and does not make them up later.
- Does not fast, and does make missed Ramadan fasts up later as qada.
- Does not perform tawaf.
- Does not enter Masjid al-Haram or Masjid al-Nabi or stay in any mosque.
- Does not touch Quranic Arabic or the name of Allah.
- Performs ghusl al-hayd when bleeding ends. A full ritual bath that restores her to tuhr.
Where hayd ends and other categories begin
If bleeding lasts under three days → it is istihada from day one. If bleeding lasts more than ten → the first ten are partitioned as hayd, the rest are istihada. Bleeding after childbirth is nifas, a separate category. Bleeding before age nine lunar years (A. Sistani 434) or after age sixty lunar years (A. Sistani 433) is not hayd.
Tools on this site
- Hayd vs istihada classifier. Type a few days of bleeding, see how A. Sistani’s rules categorise them.
- Islamic age calculator. Convert a Gregorian birthdate to lunar years for menarche / menopause checks.
Primary sources
- A. Sistani · 438 Hayd duration: 3 to 10 days
Ḥayḍ cannot last for less than three days or more than ten days; if bleeding lasts for even a little less than three days, it is not ḥayḍ.
- A. Sistani · 439 First three days of hayd must be continuous
The first three days of ḥayḍ must be continuous; therefore, 46 A sayyidah is a female descendant of Hāshim, the great grandfather of Prophet Muḥammad (Ṣ). 47 This is explained in Ruling 468. if, for example, a woman experiences bleeding for two days, and then the bleeding stops for one day, and then she experiences bleeding again for one day, it is not ḥayḍ.
- A. Sistani · 432 Physical signs of hayd blood
Most of the time, the blood of ḥayḍ is thick and warm, its colour is black or red, and it comes out with a little pressure and a burning sensation.
- A. Sistani · 492 Ten clear days separate two distinct hayds
If a woman who usually experiences bleeding once a month experiences bleeding twice in one month, then in the event that the number of days on which her bleeding stops in between is not less than ten, she must consider both bleedings to be ḥayḍ even if one of them does not have the attributes of ḥayḍ.
- A. Sistani · 434 Menarche threshold. Nine lunar years
Bleeding that a girl experiences before the age of nine is not ḥayḍ.
- A. Sistani · 433 Menopause threshold. Sixty lunar years
The bleeding that women above the age of sixty expe rience is not ruled to be ḥayḍ; however, a woman can experience ḥayḍ between the age of fifty and sixty, although the recommended precaution is that women who are not Qurayshi (sayyidah)46 and who experience bleeding which would previously have been ruled to be ḥayḍ [i.e. had they experienced it before the age of fifty, it would have been ruled to be ḥayḍ], should refrain from doing the things that are unlawful for a ḥāʾiḍ to do and perform the duties of a mustaḥāḍah.