The MS Hug is another one of those vague symptoms that vary from person to person. I find it bothers me more when I'm tired, so I get it at night. Mine usually hits as a constant...ache, I'd say, more than a sharp pain.
It almost feels like someone is pressing their fist under my rib cage, usually on the right side. I turn to the heating pad for some relief, and pick up my book, diversion therapy.
Sometimes, it feels like I'm wearing a too tight band around my ribs.
I'll admit I've done a lot more of those deep breathing exercises since the workshop I attended on Living Better with Chronic Pain.
Whatever works, right?
Here's an article on dealing with MS Hug, maybe you'll find something new that might help you.