Sen lines are the ten main energy lines of Thai medicine along which pressure is applied, a line-based relative of 📝Acupressure.
Palming and thumbing follow those paths rather than chasing a single sore spot. In 📝Thai Bodywork the map is a working picture from a living tradition, not a dissected organ, not a medical meridian diagnosis, and not a claim to treat qi as a disease. The session test is whether the line of contact feels easier, not whether a textbook sen has been "opened."
Clients feel a path of pressure, sometimes a referred warmth. Sharp, numb, or panicky sensation is a stop. This practice does not needle.