As discussed above, San Jiao is a functional system essential for the movement and distribution of Yuan Qi, Yang Qi, and Blood. It mediates between Heart Shen and Kidney Jing and integrates Yin and Yang, as well as Heaven and Earth.
The function of San Jiao arises from the Lower Jiao and unfolds upward through the Middle Jiao to the Upper Jiao, supported by the Ren Mai. Therefore, if the Lower Jiao does not function properly — for example, if there is stagnation — symptoms of deficiency may appear in the Jiaos above. These can include digestive problems (Middle Jiao), cough (when Lung Qi fails to descend), or chest pain, breast problems, and similar conditions (Upper Jiao).
It is also important to remember that the connection between Kidney Jing and Heart Shen can become impaired, leading to psycho-emotional symptoms.
If the Middle Jiao is full, the connection between the Heart and Yi / Earth becomes imbalanced. In this situation, a person may overly focus on intellect and knowledge while lacking intuition and true intelligence, which in turn leads to further stagnation.
If MJiao is weak – there is a weak centre, so again there is no connection between LJiao and UJiao, leading both to emotional problems like anxiety or fear, and poor transformation of food and tiredness.
Pulse diagnosis, together with an understanding of the patient’s constitutional energy, are the primary diagnostic tools. They help us identify which of the three Jiaos is imbalanced, why communication between them is disrupted, and how to treat the condition appropriately.
About points connecting L and U Jiao – try to study points that are located on the abdomen – Ren Mai, Kd, St points – eg Kd 20 , Kd 21, Kd 27, St 25. It depends on what you need to do with the energy. Also the combination of points matters, eg using Ren 4&6 together will send energy from Lower to Upper Jiao. Ren 4 & 14 together strenghen the connectiol between Jing and Shen.