Tightness around the ribcage can be caused by broken ribs, pulled or strained muscles, or fluid in or around the lung or heart.
Anxiety
chicken fat
Swelling, mainly from a virus or a bacterial infection.
If you Feel around the bottom of your ribcage the diaphragm is around there :)
Stress, in some shape or form.
Ferrets do have a ribcage
the diaphragm relaxes and that causes the ribcage to compress (get smaller) this pushes air out, and you have exhailed
Yes, having a hypoplastic 12th rib certainly can cause pain around the ribcage. While this is not painful for everyone, it can cause pressure on the surrounding tissue and create a kind of bruising sensation.
tightness in a muscle
that means your ribcage is open and is showing
Tight is the adjective derived from tightness.