وَدَمُ الِاسْتِحَاضَةِ كَرُعَافٍ دَائِمٍ لَا يَمْنَعُ صَلَاةً وَلَا صَوْمًا وَلَا وَطْئًا
Istihadah is treated like continuous nosebleeding: it does not remove the obligation or validity of prayer and fasting, and it does not prohibit marital intercourse merely because it is Istihadah. Purification is handled under the rules of the excused person when the bleeding is continuous enough to establish that status.