Menstruation and Post-Natal bleeding, - Dought& clear, - * Rulingson istihaadah

What are the rulings to do with istihaadah (non-menstrual vaginal bleeding)?.
Praise be to Allaah.
In the answer to question no. 68818we explained when bleeding is
menses (hayd) and when it is isthaadah. When it is menses then it is
subject to the rulings on menses, and when it is istihaadah it is
subject to the rulings on istihaadah.
The main rulings on menses have been mentioned in the answer to
question no 70438.
The rulings on istihaadah are like the rulings on purity (i.e., when
one is not menstruating). There is no difference between a woman who
is experiencing istihaadah and a woman who is not menstruating or
bleeding, except the following:
1 - She has to do wudoo' for each prayer, because the Prophet (peace
and blessings of Allaah be upon him) said to Faatimah bint Abi
Hubaysh: "Then do wudoo' for every prayer." Narrated by al-Bukhaari in
the chapter on washing away blood. What that means is that she should
not do wudoo' for a prayer that is to be performed at a particular
time until the time for it has begun. If it is a prayer for which
there is no particular time, she may do wudoo' for it when she wants
to perform the prayer.
2 - When she wants to do wudoo', she has to wash away the traces of
blood, and put a piece of cotton over her private part to hold back
the blood, because the Prophet (peace and blessings of Allaah be upon
him) said to Hamnah: "I suggest you use a piece of cotton, for it will
absorb the blood." She said: It is more than that. He said: "Use a
cloth." She said: It is more than that. He said: "Then tie it tightly
around yourself." Then whatever comes out after that will not matter,
because the Prophet (peace and blessings of Allaah be upon him) said
to Faatimah bint Abi Hubaysh: "Do not pray during the days of your
menses, then wash yourself and do wudoo' for every prayer, then pray,
even if the blood falls onto the mat." Narrated by Ahmad and Ibn
Maajah.
3 - Intercourse. The scholars differed as to whether it is permissible
when one is not concerned about suffering hardship as a result of
giving it up. But the correct view is that it is permissible in all
cases, because many women, ten or more, experienced istihaadah at the
time of the Prophet (peace and blessings of Allaah be upon him), and
neither Allaah nor His Messenger forbade them to have intercourse.
Rather the words of Allaah -"keep away from women during menses"
[al-Baqarah 2:222]- indicate that it is not essential to keep away
from them at other times. Also, it is permissible for her to pray, and
intercourse is a less serious matter. Drawing an analogy between
intercourse with a woman experiencing istihaadah and a woman who is
menstruating is not correct, because they are not the same, even in
the view of those who think that it is haraam, and analogies are not
valid if the two things concerned are different. End quote.
Risaalah fi'l-Dima' al-Tabee'iyyah li'l-Nisa'by Shaykh Ibn 'Uthaymeen
(may Allaah have mercy on him).