In the Name of Allah, Most Gracious, Most Merciful.
All praise and thanks are due to Allah, and peace and blessings be upon His Messenger.
In this fatwa:
In his response to your question, Sheikh Ahmad Kutty, a senior lecturer and an Islamic scholar at the Islamic Institute of Toronto, Ontario, Canada, states:
Since menstruation can never exceed more than fifteen days, as ruled by the jurists, what you experienced is due to a condition known as istihadah or chronic bleeding; the rules of istihdahah are not the same as those of menses.
In case of istihdahah, you simply need to wash your genitals and perform wudu’ for each of the prayers you are about to perform.
I need not emphasize the fact that this, of course, is after you have performed a complete ghusl (ritual bath) immediately after the expiry of the menstrual cycle.
Allah Almighty knows best.
Editor’s note: This fatwa is from Ask the Scholar’s archive and was originally published at an earlier date.