纳（na） means appetite, which contains how much you eat and how well you can get from what you eat. In other words, it is how much you can absorb from the food. 差（cha） means bad， which is the opposite condition of good. So in a few words, the whole phrase 纳差(nacha) means you eat less and absorb little.

Na Cha belongs to stomach and spleens disease in Chinese medicine. It results from many fators, such as eating too much which can not be digested soon. Its symptom is vomitting some sour liquid, belch the gas which is sour too. Some other fator: if where is too much water in your body which can not easily expel, you will feel gastrectasia and your coat of the tongue will become more than Read more…