Regular molasses can help relieve constipation due to the high sugar content that the regular molasses contains.
The high sugar content in the molasses helps to soften your stools which makes them easier to pass so that you're able to poop again.
You may need to take a couple of spoonfuls of the regular molasses to help get your bowels moving and it could take a couple days before you're completely relieved of the constipation.
Blackstrap molasses works much better than regular molasses though at relieving the constipation for some reason.
I'm not sure why but I found that taking blackstrap molasses instead of regular molasses when I'm constipated that the constipation goes away much faster.
You can also mix half molasses with half milk and that too will help get rid of constipation.
Drinking more water and eating more fiber can also help get your bowels moving as well or try taking some over the counter laxatives.