Rules of Istiḥāḍah
Issue No.405- In the case of qalīlah istiḥāḍah, the woman should perform a separate wuḍū for each prayer, as an obligatory precaution, and it is obligatory to prevent blood from reaching other parts of the body. It is not obligatory to change the cotton or the pad although the recommended precaution is to do so. In kathīrah istiḥāḍah (excessive bleeding), it is obligatory to do three ghusls, one for fajr prayer, one for ẓuhr and ‘aṣr prayers and another for maghrib and ‘ishā’ prayers. She must perform these prayers together. That is, she should offer ‘aṣr prayer immediately after ẓuhr prayer and ‘ishā’ prayer immediately after maghrib prayer and the recommended precaution is that she should perform one wuḍū for each prayer before or after performing ghusl.