How does a woman determine when her haiz is finished?
Haiz (menstruation) does not go more than ten days and less than three days. When the blood stops as per the habit of the woman then the woman can understand that her haiz is finished. She can check it herself in bathroom etc. If you intend to ask anything else then you should submit the question again with detail.
Allah (Subhana Wa Ta’ala) knows Best
Darul Uloom Deoband