وَتَتَوَضَّأُ الْمُسْتَحَاضَةُ وَمَنْ بِهِ عُذْرٌ لِوَقْتِ كُلِّ فَرْضٍ، وَيُصَلُّونَ بِهِ مَا شَاؤُوا مِنَ الْفَرَائِضِ وَالنَّوَافِلِ
Once the excuse is legally established, the person makes Wudu for the prayer time. Within that time, the established recurring excuse itself does not require a fresh Wudu for each prayer. Fard and Nafl prayers may be performed while that Wudu remains valid.