Purity: Intermittent Excessive Istiḥāḍah

Practical Laws of Islam as per the teachings of Ayatullah Sistani

Ruling 422:

If before each prayer the bleeding of a woman with excessive istiḥāḍah stops and starts again, she must perform one ghusl for each prayer.

-Ayatullah Sistani, Practical Laws of Islam, Purification (Taharah)