What is the ruling on prayer when impurity (feces) is discovered on undergarments after the prayer, knowing there is difficulty in using the toilet outside the home and fear of impurity, and how can one use the toilet anywhere without difficulty, and what should one do if clothes are soiled with impurity outside the home?

If you find impurity (feces) on your garment after prayer and did not know about it until after you finished, your prayer is valid, and you are not required to repeat it according to the majority of scholars. However, if you were negligent in performing istinja' (cleaning oneself after relieving oneself) and the impurity remained until it spread to your clothes, or it exited from you after ablution (wudu'), then it is obligatory to remove the impurity, repeat the ablution, and repeat the prayer. You should ignore obsessive doubts in public places and should not wash your clothes unless you are certain that they have been affected by impurity.