How regular are you?
It just happen recently? Or all this while?
If happen all this while, you might need to look into elimination diet. Because it could be from hereditary disease eg. IBS-C
If recently u might need to improved your gut microbiome

You can consider to exclude dairy/milk/yogurt from your diet too, you will be surprised 90% of asian is lactose intolerance. You don’t need the cow growth hormone to be put into the body.