Let us know how you go today.

Pulsating usually means circulation... ie it's your pulse that you are feeling. Arteries pulse harder than veins as they are taking blood fresh from the heart to various parts of the body... the veins transport used blood back to be oxygenated again so the blood moves slower. I wonder if you have a hernia?

It could also be the peristalis movement of your digestion system... is the pulsating always there going at the same speed? Or does it vary?

Looking forward to hearing what it could be! Goodluck!