Why does the foot hurt when traveling for a long time?

I remember when I was studying biology, I learned two kinds of feet, flat feet and arched feet. Flat feet are not suitable for walking for a long time, because the buffer of the skeleton is not very good. If the analogy is private cars and SUVs, in fact, my feet will be very tired after a long journey, but if it hurts, you should try to reduce the amount. If it still hurts, it is recommended to go to the hospital for a professional examination.