The healthy gastro-intestinal function depends on the qi ascending of spleen and the qi descending of stomach.
External pathogenic factors such as damp weather can block spleen qi ascending thereafter cause the failure of stomach qi descending, then cause vomiting, diarrhoea, bad breath, etc.
Internal pathogenic factors such as over eating or starving can do the same damage.
Unhealthy lifestyle such as stress can cause liver qi stagnation which will overact on spleen with the consequence of dysfunction of spleen and stomach. The common symptoms include belching, hiccup, nausea or vomiting.
Heart fire can enter into small intestine and contribute to Crohn’s disease.
Lung and large intestine has a close relationship. Constipation is never just the problem of intestine.
Spleen is the source for Qi and blood production which are the power for defence and repair. Spleen deficiency accounts for many conditions such as chronic fatigue, digestive ulcer, diarrhoea, IBS, etc.
Spleen is the centre of the relationship of five important organs (Heart, Liver, Spleen, Lung, Kidney), therefore, could be the etiologic factor to the problems of other organs. Vice verse, other organ problems can cause gastro-intestinal conditions via spleen.