The waste gases and impurities within the physical body are carried away as the heart pumps blood. From there, they are sent to the lungs and expelled from the body through respiration. Once the tempering of the heart is complete, the physical body enhances this entire process, progressively reducing the amount of impurities within.
Yang Chan was currently experiencing this very change. The rapid beating of his heart, however, was placing immense pressure on his body, causing extreme discomfort from the inside out.
The Heart Strengthening Potion he had just taken was meant to address this very issue.
In truth, when breaking through to the Inner Refining of the Five Viscera, one would face various problems regardless of which organ they started with. As long as one successfully tempered the first of the Five Viscera, the remaining four would also undergo tempering without this issue recurring.
