What is the ruling on the transparent discharge that appears four days after performing ghusl (ritual purification) from menstruation? Does it require ghusl, or only wudu (ablution), and is it obligatory to change underwear for prayer?

White or transparent discharge (vaginal moisture) is pure but nullifies ablution. However, yellow discharge is impure and nullifies ablution. Neither necessitates ghusl nor changing clothes. If you suffer from incontinence of these discharges, perform ablution for each prayer after its time has begun and pray with this ablution the obligatory prayer and as many supererogatory prayers as you wish.