Colon 20 crosses to the opposite side of the body at the nose. Does anyone know if it it crosses back to its original side before entering Stomach 1 or if it stays crossed over and continues to Stomach 1 on the opposite side? This is important when chasing entry exit blocks.
This is a good question and I may not be the best person to ask as I don't use the five element theories of the entry/exit points very often. My understanding is that yes, LI 20 will connect with the stomach meridian at ST 1 on the opposite side of the body.
My understanding of this is that LI20-ST1 entry exit block is treated on the same side. This region being the only point where a channel crosses the midline of the body, provides a fundamental connection between the left and right sides of the body. The idea of entry / exit blocks relates to the movement of Qi through the channels as it follows the horary clock flow. This implies that every second day the Qi is flowing through a different side of the body, which may correlate with the idea of consecutive days alternating between Yin and Yang as per the theories within stems and branches.