Is the excessive discharge of white fluid a nullifier of Wudu, and is it obligatory to remain in a state of Wudu between prayers and when performing Umrah?

What exits from the two private parts (front and back) invalidates wudu', unless it is continuous ( سلس ), in which case it does not invalidate it. However, it is recommended to perform wudu' for each prayer due to it, and this is the relied-upon opinion among the Malikis. If this becomes difficult, one can adopt their view that it does not invalidate wudu' and only recommends performing it. One must wear a protective pad and perform wudu' for each prayer after its time has begun, and there is no harm in what exits after that if you are wearing protection.