Every time I am fasting (not eating anything but drinking water only) after fasting, in the evening I eat a good meal, but the next morning I get pains while urinating and afterwards. I experience this pain for about 5 min. If I have eaten normally, without fasting, I never experience this problem. What could be the problem?

:-/ I don't know if this is a religious thing but if it is it might be causing a health problem. My friend in school passed out from fasting and maybe you might have to skip fasting if its religious I'm so sorry if I have offenede you but that is what she did. (Gave up religion for health)