Periostitis

Periostitis inflames the covering of the bone - and bone, in this framework, is one's deepest structure: the framework of principles and support on which one's whole being is built, nourished by the same inner reserves as one's courage ("solid kidneys make solid bones"). Inflammation there is read as that fundamental support irritated and under threat, leaving one feeling there is no firm ground to stand on. The short explanation's "intense feelings of helplessness" sits in that shaken sense of one's own support. Relief is described as restoring one's inner footing and principles, and easing the fear so one's structure feels supported again.

Example from the findings: the inflamed bone-covering is read as one's fundamental support under threat, leaving a sense of helplessness.