High fibre diet - Avoid foods like potato, non veg
You can consume any vegetable that's green in color
Try to incorporate one fruit in your diet everyday, preferably a banana
Plenty of water, atleast 3 to 4 lits everyday
Fibre powder such as Lactifibre, 2 TSP in one glass of room temperature water taken at bedtime will help.
Taking laxatives such as Cremaffin and triphala will give you only temporary relief.
Next Steps
Meet a Gastroenterologist so it can be evaluated completely
Health Tips
Avoid Laxative abuse