Do the yellow or white fluids that sometimes come out necessitate ablution after the time for prayer has begun, and is the ablution valid if performed before the time for prayer has begun due to the difficulty of performing ablution at the destination?

One who experiences a continuous impurity (such as urinary incontinence or istihada - non-menstrual vaginal bleeding) should perform ablution for each prayer and wear something that prevents the discharge from spreading, so as not to defile their body and clothes. Their purification is a purification of necessity and should not be performed before the time of prayer. Past prayers performed out of ignorance are valid and do not need to be repeated. A Muslim should fear Allah as much as they are able.