I was contantly plagued by constipation when I was young

. One time it got so bad that I was immobile and had to be physically carried to the car and rushed to the medical clinic. Constipation can have grave consequence. If the waste is not released on time, the overloaded intestine can explode resultiing in death. If you are severely affected, you have to do something about it or seek medical help.
My body has changed over time and with older age, I am more regular now. Looking back, I used to eat a very unhealthy diet. I hated (still do) vegetables and my diet was mainly meat, seafood and starch.
You may want to add more fiber to your diet. Try eating a serving of cereal daily. I know most Asians (myself included) do not like those Kellogs type dry cereal. However, I found the Quaker brand oatmeal squares, cheerios and Kellogs frosted mini wheats to be acceptable in taste. Do not know if you are Asian but just want to throw out this little piece of info. To make it taste better, jazz up the cereal with bananas, raisins or whatever you fancy. These brands are readily available in SG.
You may want to get those nutritional products that are high in fiber like metamucil. Nowadays, I drink a wheat grass supplement (high in chlorophll content). It not only provides my body with lots of nutrition but is high in fiber. The barley grass type also serves the same function.
I am only providing information base on personal experience. Please remember that I am by no means a trained person qualified to give medical advice .