Nutrition & body image
Why does everyone talk about what they eat?
Body-focused culture starts very early, and it is not neutral. Most eating advice aimed at teenagers is not designed for teenagers, and most of it is not really about health. If eating is taking over your life, that is a serious health problem and it is treatable.
What this does and does not tell you
This is general information, not a diagnosis. Only a clinician can examine you, take your history and run tests. The same symptom has different causes in different people.
If something is sudden, severe, or getting worse quickly, get medical advice rather than reading on.