"Umm Habibah bint Jahsh asked the Messenger of Allah ﷺ: 'O Messenger of Allah, I suffer from Istihadah.' He said: 'That is a vein, so perform Ghusl, then pray.' And she used to perform Ghusl for each prayer."
قَالَتِ اسْتَفْتَتْ أُمُّ حَبِيبَةَ بِنْتُ جَحْشٍ رَسُولَ اللَّهِ ﷺ فَقَالَتْ يَا رَسُولَ اللَّهِ إِنِّي أُسْتَحَاضُ فَقَالَ إِنَّ ذَلِكِ عِرْقٌ فَاغْتَسِلِي ثُمَّ صَلِّي فَكَانَتْ تَغْتَسِلُ عِنْدَ كُلِّ صَلاَةٍ