Internal diseases develop as one or more of the TCM organs - Lung, Heart, Kidney, Liver, Spleen/Stomach, Small Intestine, Large Intestine, Gall Bladder, Bladder - malfunction. Note the organs in TCM do not match the anatomical organs. A TCM organ represents a collection of the anatomical organs that perform certain functions. Whether an organ functions normally or not depends on many factors: lifestyle (diet, sleep, exercise, etc.), emotions, age and heredity, and the environmental factors of wind, dampness, heat, cold and so on.
In general, we can classify the TCM organs as "storing" organs (Heart, Lung, Spleen, Liver and Kidney) or "transporting" organs (Small Intestine, Large Intestine, Stomach, Gall Bladder and Bladder). Going through these organs are Qi and Blood, two vital elements in our body. The theory of Yin and Yang further specifies Qi as Yin Qi and Yang Qi. Yin Qi moves down to the "storing" organs to form the blood while Yang Qi moves along with the blood out of the "transporting" organs to support bodily activities. When these two types of Qi are in balance, our body is healthy with sufficient energy. To treat internal conditions, therefore, we need to analyze what cause the imbalance of Qi and Blood across the organs.
The first step is to find out where Qi and Blood are weak or stagnant in the meridian channels. This TCM diagnosis goes hand in hand with the conventional diagnosis by Western medicine from your family physicians and specialists as today's TCM practitioners are also trained in Western medicine. Then acupuncture and other TCM therapies are performed to remove the blockage so that Qi and Blood can flow to restore the function(s) of the ill organ(s). The effect of the treatment depends on the overall level of energy of the patient. Most importantly, the patient must have a healthy living style per TCM practitioners.