This promotes healthy movement of the bowels:

The ileocecal valve, which is situated on the left side of the body, is responsible for linking the big and small intestines. It is possible that sleeping on this side may facilitate the smooth transfer of waste from the small to the large intestine, which will help to ensure that regular bowel movements occur as a result of the assistance of gravity.

In spite of the fact that it may take some time to get accustomed to, sleeping on your left side may be a habit that is advantageous to your health. It is possible that at first it may feel unpleasant; but, if you continue through it, you will eventually create a habit and become aware of these health advantages. Trying out the left-side position might be a simple but efficient method to improve your general health and well-being if you are contemplating making a change to the way you normally sleep.