Its not like you don't produce gas, it varies you might produce it in small amt and it passes without being noticed or with stool. Don't worry about it if you dont have any problem For constipation you need to start taking adequate amount of fluid, fibres in diet and start some physical activity or exercise. If it doesn't resolve with it u need to take some laxative.

A small amount of gas is always produced and passed unnoticeably. However it is normal and don't get worried about it. For constipation, if it is mild...ample amount of fluids, fiber, health toilet routine and daily physical outdoor activities are necessary.