When is chest tightness an emergency?

Treat chest tightness as an emergency - call an ambulance, do not drive yourself - when any of these are true: the tightness is heavy, crushing, squeezing, or like pressure; it spreads to one or both arms, the neck, jaw, stomach, or back; or it comes with sweating, feeling sick, shortness of breath, light-headedness, or pale or grey skin. That is the heart attack cluster, and minutes decide how much heart muscle survives. Also emergency: sudden tightness with breathlessness and a racing heart (possible clot or collapsed lung), chest pain with coughing blood, or pain tearing toward the back. On the other side of the line, tightness is often not the heart: a sharp, brief, pinpoint pain; pain you can reproduce by pressing the chest wall or twisting; tightness with worry, racing thoughts, and tingling (a panic attack pattern - frightening but not dangerous); or burning after meals (reflux). The honest complication: panic and heart symptoms genuinely overlap, and even professionals use tests to separate them - so the rule is not to self-diagnose in the grey zone. New, unexplained, or severe chest tightness in an adult gets assessed today, and the emergency cluster gets an ambulance. Pymander is a free AI doctor, 24/7 by text, for non-emergency sorting - but the cluster above means hang up on everyone and call emergency services.