ভূমিকা
Ruling 392. For slight istiḥāḍah, a woman must perform one wuḍūʾ for every prayer and she must wash the outside of the vagina with water if there is blood there. And based on recommended precaution, she should purify the piece of cotton [or sanitary pad/another absorbent item] with water or change it for every prayer.
Ruling 393.* For medium istiḥāḍah, a woman must, based on obligatory precaution, perform one ghusl daily for her prayers, and she must do the things that were mentioned in the previous ruling with regard to slight istiḥāḍah. Therefore, if she experiences medium istiḥāḍah before or during morning (ṣubḥ) prayers, she must perform ghusl for ṣubḥ prayers based on obligatory precaution.
If she intentionally or forgetfully does not perform ghusl for ṣubḥ prayers, she must perform ghusl for midday (ẓuhr) and afternoon (ʿaṣr) prayers. And if she does not perform ghusl for ẓuhr and ʿaṣr prayers, she must perform ghusl before prayers after sunset (maghrib) and evening (ʿishāʾ) prayers, whether the bleeding has stopped or not.
Ruling 394.* For excessive istiḥāḍah, a woman must, based on obligatory precaution, change or purify with water the piece of cotton [or sanitary pad/another absorbent item]. It is also necessary for her to perform one ghusl for ṣubḥ prayers, one for ẓuhr and ʿaṣr prayers, and one for maghrib and ʿishāʾ prayers. Furthermore, she must not delay between ẓuhr and ʿaṣr prayers nor between maghrib and ʿishāʾ prayers; if she delays between them, she must perform ghusl again for ʿaṣr and ʿishāʾ prayers.
All of this applies when blood continuously soaks the piece of cotton [or sanitary pad/another absorbent item] and reaches the bottom of it.
However, in the event that there is a delay in the blood soaking the piece of cotton [or sanitary pad/another absorbent item] and reaching the bottom of it to the extent that the woman can perform one or more prayers in that time, the obligatory precaution is that whenever the blood soaks the piece of cotton [or sanitary pad/another absorbent item] and reaches the bottom of it, she must change or purify it with water and perform ghusl.
Therefore, if a woman performs ghusl and, for example, she performs ẓuhr prayers but before ʿaṣr prayers or during ʿaṣr prayers blood soaks the piece of cotton [or sanitary pad/another absorbent item] and reaches the bottom of it, then again, she must perform ghusl for ʿaṣr prayers based on obligatory precaution.