Hi thanks for asking question. You have no need to take dye like that used in colonoscopy to relieve constipation. Simple x ray abdomen and ultrasound examination will relieve if any organic cause present. For relieving constipation stool softener taken.like that of liquid paraffine. Digestive enzyme tablet can be taken. Fibre supplement helpful.food that contain it are whole grain,broccoli,apple, wheat etc. Drink more water and fruit juice. Do regular light exercise.fennel in tea is useful. Avoid stress and limit smoking if have habit. With above measure you will surely get relief , no need of worry right now. Wish you good health .