The lesion and root cause, the lesion is the site of onset, while the root cause is the fundamental organ and meridian of onset. Broadly speaking, the root cause of onset is more accurate. For example, when spleen deficiency causes discomfort in the stomach on an empty stomach, it is not a stomach disease itself. At first, it was a simple spleen disease, but over time, if left untreated, it can lead to stomach disease as well. Such and so on, many. In summary, seeking medical treatment should not be mechanized, but flexible and adaptable. In the early, middle, worsening, and transformation stages of the disease, it is important to have a clear understanding.
病灶和病根，病灶就是发病部位，而病根就是发病的根本脏器，根本经络，广义讲发病的根本原因，较为准确。比如脾虚导致空腹时候胃难受，本身就不是胃病，起初是单纯的脾病，久而久之没有及时治疗导致胃也病了。诸如此类，很多。总而言之，看病不要机械化，灵活变通。病的初期，中期，加重，转化，要心中有数。