What is a characteristic symptom when the deep yang luo channels are injured?

The characteristic symptom associated with injury to the deep yang luo channels is the tendency to bleed upward. This phenomenon is rooted in the fundamental understanding of how the channels function within Traditional Chinese Medicine (TCM).

In TCM, the deep yang channels are closely tied to the body's ability to rise and disperse Qi and Blood. When these channels are compromised or injured, it disrupts the normal flow of Qi and Blood, resulting in symptoms that reflect an upward movement. This can manifest as bleeding from various upper regions of the body, such as the nose or even in the lungs.

The other options reflect possible directions or characteristics of bleeding but do not align with the specific manifestation associated with deep yang luo channel injury. When considering the nature of these channels and their role in supporting upward movement, it becomes clear why the tendency to bleed upward is the defining symptom in this context. This understanding is crucial for practitioners as it guides diagnosis and treatment strategies in TCM.