Transmission by dominance relationship:

(a) Mutual aggression: designates the disease that appears as a consequence of excessive dominance. When the pathology is caused by mutual aggression it is less serious than by mutual insult.
Two possibilities:
The dominating element is too strong. H + B
The dominated element is very weak. H B –
– The liver attacks the spleen-stomach: if the liver Qi stagnates, it attacks the spleen, disturbing its transport and transformation function as well as its ascending function (diarrheic).
(It also impairs the function of decomposition and maturation of food as well as preventing the stomach Qi from fulfilling its descending function (constipation).
– Heart attacks Lung: Heart Fire dries up the fluids in the Lung (Lung Yin emptiness).
– Spleen attacks kidney: if the spleen has dampness, it can hinder the kidney’s function of transforming and excreting fluids.
– Lung attacks the liver: a lung vacuum due to stasis of liver Qi is rarely encountered.
– Kidney attacks the heart: if the kidney yin is empty (empty heat), it can be transmitted to the heart.
b) Mutual insult: this means that the disease occurs as a result of a reversal in the dominance relationship.

Two possibilities:
The dominating element is too weak. H P –     Dominant.
Dominated
The dominated element is very strong. H +P

– Liver insults Lung: if Liver Qi stagnates at the top, it can obstruct breathing.
– The heart insults the kidney: the heart fire can be transmitted to the kidneys causing a Kidney Yin vacuum.
– Spleen insults the liver: if the spleen is attacked by Dampness it can spread and disturb the free circulation of Liver Qi.
– Lung insults the heart: if the lungs are stagnated by tan (phlegm) it can disturb the circulation of Heart Qi.
– Kidney insults the spleen: if the kidney cannot transform liquids, the spleen will be attacked by dampness.