Sore to touch and move rib pain

[Radiotwointhecar]

The bottom rib on my left side is really sore and tender to touch is one specific spot. It also hurts if I move in a specific way or when I roll over in bed. It twinges when I take a deep breath but I can pinpoint exactly where the soreness is. Seems to get worse if I touch it.
Any ideas?

As far as I know I’ve done nothing differently.

Sounds like costochondralitist.

I have the same. I check out Costochondritis but that says pain where the ribs join the sternum. My pain is in the middle of the last/lowest rib on the left side.

Have had it for about 18 months now so can't be a crack or a break as it would have healed. GP has not been helpful.