Hadith no. 305 is a repeat. Read it here.
Once one of the wives of the Prophet did I’tikaf along with him and she was getting bleeding in between her periods. She used to see the blood (from her private parts) and she would perhaps put a dish under her for the blood. (The sub-narrator ‘Ikrima added, ‘Aisha once saw the liquid of safflower and said, “It looks like what so and so used to have.”)
The blood of istihadha has a different color than the period blood. And the precautions that a woman needs to take while experiencing istihadha are mentioned in this Hadith and the one given in reference above. That she should figure out a way to contain this blood and wash it away before each Salah, followed by fresh wudu. I hope it’s clear enough. If you have any questions, please don’t hesitate to ask. :)