Not directly under the armpit, but on the heel
Why apply herbs to the heel? This is based on a principle, the principle that use herbs adjust the internal environment of the body.
The body build with many organs and tissues. Each organ and tissue has its own circadian rhythm, high tide and low tide. The main function output or self-maintenance and repair are the main thing, which changes with time and environment. This rhythm of changes in various organs and tissues constitutes the internal environment of the body. When the external environment changes, the internal environment will change, allowing the body to adapt to the changes in the environment. For example, when the temperature becomes hot, drinking water and sweating are needed to keep the body temperature constant. At this time, a series of related organs and tissues must be adjusted. When the state of an internal organ changes, it will also cause a series of related changes, for example, after we eat, the entire digestive system will enter a digestive state.
These changes in daily life are happening all the time. As long as our lives are not over, the changes in the internal environment will not stop. Whether it comes from genes, living environment, or lifestyle, our internal environment is different. Just like everyone runs differently, the reaction speed and ability of each organ are also different. When the organs are not coordinated, there will be some phenomena. Just like in a long-distance race, some people quickly feel that they can't breathe and can't catch their breath; some people feel weak and can't move their legs. And successful long-distance runners can run long distances for a long time. More inconsistencies that are not so obvious happen in the body from time to time.
Based on this understanding, if we can use herbs to improve the coordination of the internal organs of our body and improve the internal environment of the body, our body will perform better.
We all try to improve various physical performances that make us dissatisfied with this method. Then we will not just be entangled in the part that we are not satisfied with, but will look at the problem systematically. When our body odor makes us unsatisfied, we can also use this adjustment method to change it.
If the external application of herbal medicine is used to adjust the body internal environment, where is the best part?
Because herbs have some colors and flavors. In order not to affect our daily life, it is best not to apply it to the part that can expose the color and flavor. The heel meets these requirements. However, the most important thing is to be able to adjust the internal environment of the body.
Another thing is, according to the meridian theory, there are many meridians passing through the heel, through these meridians, the externally applied herbs can have an effect on the whole body. Moreover, according to the theory of yin and yang, there are both Yin and Yang meridian pass through the heel, so the effects from heel are balanced.
All of these are why herbal medicine is applied to the heel.