It may be due to slow peristalsis, Food allergies or minimal Intestinal obstruction due to some infection/infestation/Inflammation,
We need more information for correct diagnosis and treatment and You can send me more information through practo consult.
Next Steps
Until then you can take Homeopathic Treatment.
If you have Faith in Homeopathy, You can use following Homeopathic Medicines:
(1) Kalmegh Q
(2) Chelidonium Q
Health Tips
Avoid fat fried food, take small meals at short intervals, preferably early breakfast and light dinner.
Performing Kapalbhati Pranayama and Bhastrika Pranayama with Neoli-Kriya in mornings after passing stools will certainly help you until it is cured.