Constipation happens due to poor lifestyle, eating food and sleeping at different times, it normally happens for those who are affected by bloating gas in their stomach.
Yoga is the only way without hard treatment or pills you can cure it, Try these yoga poses, this is a reference app and it comes with your phone.
Try this android app on playstore.
App Review
Good and useful app for people who are suffering from constipation, i like the design.