Final answer:
In traditional Chinese medicine, the gallbladder meridian doesn't directly pass through the sacrum, but runs along the side of the body affecting the hip area close to the sacrum and has points to treat issues related to the lower back and sacrum.
Step-by-step explanation:
The question "which GB channels go to sacrum?" appears to concern the gallbladder meridian in the context of traditional Chinese medicine (TCM). In TCM, the concept of meridians or channels is crucial to understanding how energy, or qi, flows through the body. According to TCM theory, the gallbladder meridian (GB) is one of the twelve primary channels and it extends from the head to the toes. The path of the gallbladder meridian does not directly pass through the sacrum; however, it runs along the side of the body and influences the area of the hips, which is adjacent to the sacrum. There are also points on the gallbladder meridian that can be used to treat issues related to the sacrum and lower back area as per TCM practices.