While there are many similarities between Thai sen lines and Chinese meridians, there are significant differences. First, sen lines all begin at the navel, travel to an external exit point like the mouth, nose or anus, then travel back to the navel. Meridians either start or end at the fingertips or toes, and when qi is flowing correctly, it travels in only one direction.
Second, sen lines travel along several meridians instead of working in parallel with the acupuncture system. For example, the Sen Itta starts at the navel, travels down the Kidney line of the left leg to the knee, then turns and follows the left Bladder line to the forehead, where it ends by following the Du Mai to the mouth.
Third, many sen lines exist only on the left (feminine) side or the right (masculine) side. So Sen Itta and Sen Pingkala are mirror images of each other, but Sen Itta is on the left side, and Sen Pingkala is on the right.
Fourth, in Thai massage and acupuncture, the practitioner harmonizes and clears imbalances in the energy system. But Thai massage practitioners use their fingers, palms, elbows, knees, and feet to correct the energetic blockages. Acupuncturists insert sterile, single-use, hair-thin pins at various points on the body along the meridians.