Ask most people where they feel stress and they will point at their head. Ask them to close their eyes and check their jaw, and something shifts. The body has been keeping a record all along, in a language of tightness and holding, and almost nobody has been reading it.
The order things happen in
We tend to assume the sequence runs: something happens, I think about it, I feel it, my body reacts. In practice the body is often first. The shoulders come up before the thought arrives. The stomach tightens on the way into a building. By the time there are words for it, the physical part has been going for a while.
This is why a body scan is not a relaxation exercise. It is closer to reading a page you have been writing all day without looking at it.
The body is not a metaphor for what you feel. It is where you feel it, first, and often for hours before you notice.
Doing it without the mysticism
Sit or lie down. Start at the top of the head and move slowly down: forehead, eyes, jaw, throat, shoulders, arms, hands, chest, stomach, hips, legs, feet. At each place, ask one plain question. Is there anything held here?
You are not trying to relax it. You are trying to notice it. Trying to relax turns the scan into another task you can fail at, and tension does not respond well to being ordered about. Noticing is enough, and noticing is often what lets go.
The three places most people find
The jaw, held from concentrating and from not saying things. The shoulders, raised as though bracing for something. And the stomach, which tightens around anticipation more reliably than any other part.
Yours may be elsewhere: the throat, the lower back, the hands. What matters is that it is consistent. Most people have one or two places that hold everything, and knowing yours turns a vague bad day into a specific piece of information.
Why write it down
Because the pattern is the useful part, and the pattern only shows up over time. Scan for a minute, note where and how tight, and add one line about what the day held. After a week or two the pairs start appearing: the shoulders on days with a particular meeting, the stomach before a particular phone call.
That is no longer a mood. It is a map, and a map can be acted on.