What is Spleen?
Spleen is located behind the stomach below the diaphragm.  In modern medicine spleen is categorized only into an immune system where it filters blood and removes old and damaged red blood cells, bacteria and other particles.  It also produces lymphocytes which is a type of white blood cell.  Some MDs tell their patients to remove patients’ spleen when there are some issues with it; however, that’s a NO! NO! with Traditional medicine..
In Traditional medicine the Spleen is said to have Earth (Soil) characteristics in its function. It involves itself mainly with nutrition distribution (blood flow trafficking), digestion issues, bowl movement control, menstruation amount, temperature maintenance, appetite, digestion.  Spleen shows sensitive response with liver’s condition.  As we discussed in my earlier article on liver, the liver is the organ responds very fast with our emotions, and it influences spleens function directly.  This is explained through liver-spleen (tree-soil) control relationship (tree prevents soil from land sliding)in “Five Branch Relationship.”
There are Qi(yang) and blood(Yin) deficiency conditions as main ones.  One of the major issues that can develop from slowdown of spleen function is dampness in your system or that very dampness can affect the spleen activity. Dampness is considered as one of major pathogens in our system which can trigger variety of ailments ranging from poor digestion and bowl movement, joint paint(arthritis), poor circulation therefore edema, overweight, bleeding, bruises.   It has been found in Traditional medicine that spleen likes dry condition in its own system and surrounding system.  Tongue shows substantial white/yellow coatings on its taste buds if there are excess amount of dampness forming in your body.  Yellow coatings mean heat dampness.  
In next article we will continue with spleen and look into spleen Qi deficient condition.