Answered by Ustadh Tabraze Azam
A woman has her menses for 6 or 7 days and takes a Ghusl after seeing the white discharge. The white discharge is normally slightly yellowish in color during her pure days. If she sees a slight yellowish discharge on her undergarments, will it be counted as menstruation and does she have to perform a Ghusl again?
No, you would not be required to repeat the ritual bath (ghusl) in the case that you saw a yellowish stain on your undergarments after the end of your menstrual period. Normal white discharge can often change color after oxidization, and you can assume that to be the case here, particularly as it occurs after your habit is over.
Please also see:
How Can I Know the End of My Menstrual Period?
And Allah Most High alone knows best.
[Ustadh] Tabraze Azam
Checked and Approved by Shaykh Faraz Rabbani
Ustadh Tabraze Azam holds a BSc in Computer Science from the University of Leicester, where he also served as the President of the Islamic Society. He memorized the entire Qur’an in his hometown of Ipswich at the tender age of sixteen and has since studied the Islamic Sciences in traditional settings in the UK, Jordan, and Turkey. He is currently pursuing advanced studies in Jordan, where he is presently based with his family.