I am 36 years old female and unmarried. For more than a week now, I have had symptoms that after eating for more than 1 hour, I have to go to the toilet (not diarrhea). After I finished walking, I had a dull pain in my stomach, if I lie down, it will go away after a while. The doctor asked me to go outside, dull stomach pain after 1 hour of eating, what is the sign of disease? Please advise me, thank you doctor.