Pain!
Terrible pain started coursing through his body, as he felt like not only every cell but also every molecule of his body was slowly undergoing a deep and hard hand washing.
Every single element of impurity was being ripped out of his cells, and molecules and then thrown outside like it was some kind of poison or disease that the body deemed as threatening to itself.
In fact, impurities were nothing more than extra materials inside one's body, not necessarily dangerous, but that disturbed the perfect proportions.
For example, having a big nose wasn't a dangerous thing to have, but it disrupted the aesthetic proportions and the definition of beauty that people had.
The same case was applicable to Tianlong Yun's body, what the Origin Milk Essence deemed impurities included even the distorted proportions of the internal organs and their functions.
