Some Other Issues Regarding Hayz.

500. If a Mubtadea, a Mudhtaribah, a Naisya, and a woman with the fixed habit of duration, see blood with the signs of Hayz, or are certain that the discharge would last for three days, they must abandon the obligatory prayers. But if they understand that it was not Hayz, they have to give the Qadha of the prayers they did not perform, but if she is certain that the discharge would last for three days and she does not have the signs of Hayz, as an obligatory precaution, she must perform the rules of Istihaza until 3 days and refrain from doing what is Haraam for Haaez, and if she is not Pak after three days, she must consider it as Hayz

501. If a woman has a fixed habit of Hayz, either of time or of duration or of both, and if she sees blood for two consecutive months contrary to her usual habit in which her finds that the time, the duration or both coincide then she has formed a new habit. For example, if previously she saw blood from 1st to 7th of a month, but during these two months she saw it from the 10th to 17th, then the period from 10th to 17th of the month will be her new habit

503. If a woman usually sees blood once in a month, but in a particular month she sees it twice with signs of Hayz, and if the number of intervening days during which she remained Pak is not less than 10, she should treat both as periods of Hayz

504. If a woman sees blood with signs of Hayz for 3 days and thereafter for 10 or more, she sees blood with the signs of Istihaza ad again she sees blood with signs of Hayz for 3 days, she should treat the first and last bleeding as Hayz.

505. If a woman becomes Pak before the expiry of 10 days and feels that there is no blood in her interior part, she should do Ghusl for the acts of worship although she may have a
feeling that blood might appear once again before the completion of 10 days. And if she is sure that she will see blood before the lapse of 10 days, she should not do Ghusl and perform her Namaz, but she will refrain from doing those acts, which are forbidden to a Haaez

506. If a woman becomes Pak before 10 days, but feels that there might be blood in her interior part, she should insert cotton and wait for some time to find out. If she finds out that she has become Pak, she should take bath and perform her acts of worship. And if she finds out that she has not become Pak totally, and she does not have a fixed habit of Hayz or if her habit is 10 days, then she will wait. If she becomes Pak before ten days, she will Ghusl. If she becomes Pak on completion of 10 days, or if her bleeding exceeds ten days, then she will do Ghusl at the end of 10th day.
And if her habit is for less than 10 days, and she is sure that the blood will cease before ten days are over, or by the end of the 10th day, she must not do Ghusl till then. And if she has a feeling that her bleeding might exceed ten days, it is an obligatory precaution that she avoids acts of worship for a day, or up to the 10th day. But it is better for her not to do what is Haraam for Haaez and observe the rules of Istihaza. Therefore, if expiry of ten days or on the ten days, she becomes Pak, the whole period is Hayz; but if it exceeds ten days, she must consider her habit as Hayz and the rest as Istihaza and the worships which she did not perform after the days of habit should be performed in Qadha.

507. if a woman treats the blood she saw during certain days as Hayz and did not perform her acts of worship and comes to know later that it was not Hayz, she should give Qadha of the lapsed prayers, and fasts, which she left out. And if she performs acts of worship under the impression that the blood is not Hayz, but realizes later that it was Hayz, then the fasts kept in those days will be void and, therefore, she should give Qadha of those fasts.