Can a person stop the undigested wastes inside him and in that condition is it correct to offer the prayer?

Question

Sometimes, after making wudu for salat and come from the bathroom, then suddenly I feel uncomfortable because my body wants to waste off undigested food from it. But I can not go again because I am in a wuzu condition and I prefer to offer the prayer and then go to bathroom. Is it does not affect my salat? Can a person offer the prayer in that condition?