I've been having a similar issue for the past year. Was getting sharp pains in my stomach one evening after playing frisbee in the park and the next morning I woke up feeling as though I'd been hit with a baseball bat in my left side. Severity has come and gone through the year, but really bad at the moment. All my blood work has been fine and my thoughts have been if I have this level of pain after a year and no other symptoms it surely can't be an organ. Nor would it feel so bruised.

Prior to the pain, for a few years my lower left rib would pop if i moved my hips side to side, since the pain introduced itself it no longer pops. The pain I experience is tender to the touch around the lower ribs, pain in the back, upper left hip and even sometimes when I raise my arm. It sometimea feels like burning nerve pain, other times a bruised ache or sharp. It hurts to bend forward and lean on my left side, and do any exercise. I do also have very mild scoliosis and a slightly flared rib which I doubt helps.

I'm bringing it up with my GP tomorrow but each time I search for Slipping Rib Syndrome on UK pages including NHS I can't find it. Anyone in the UK here have any luck with the doctors investigating it? 

I've been having a similar issue for the past year. Was getting sharp pains in my stomach one evening after playing frisbee in the park and the next morning I woke up feeling as though I'd been hit with a baseball bat in my left side. Severity has come and gone through the year, but really bad at the moment. All my blood work has been fine and my thoughts have been if I have this level of pain after a year and no other symptoms it surely can't be an organ. Nor would it feel so bruised.

Prior to the pain, for a few years my lower left rib would pop if i moved my hips side to side, since the pain introduced itself it no longer pops. The pain I experience is tender to the touch around the lower ribs, pain in the back, upper left hip and even sometimes when I raise my arm. It sometimea feels like burning nerve pain, other times a bruised ache or sharp. It hurts to bend forward and lean on my left side, and do any exercise. I do also have very mild scoliosis and a slightly flared rib which I doubt helps.

I'm bringing it up with my GP tomorrow but each time I search for Slipping Rib Syndrome on UK pages including NHS I can't find it. Anyone in the UK here have any luck with the doctors investigating it? 

That sounds just like slipping rib and just like my pain. The Facebook group is called slipping rib syndome, and there are people from the UK on there. I'm actually in the UK as well. If you are on Facebook definitely find the page called "Slipping Rib Syndrome" and join. There is a picture of a rib cage as the cover photo. So many people with similar symptoms on there. And a ton of good info on doctors and procedures to fix the issue :)