A Stabbing Pain in the Right Flank? Liver and Gallbladder Health Cannot Be Separated

The close relationship between the liver and gallbladder and the impact of stress described in Donguibogam can also be interpreted compellingly from the perspective of modern medicine. In our body, the liver does not simply perform detoxification; it is a vital organ that governs the core of carbohydrate, fat, and protein metabolism and produces bile. The gallbladder concentrates and stores this bile, contracting to secrete it when fatty foods enter the small intestine to assist in fat digestion. These two organs exert a profound influence on each other, both physically and functionally. How, then, does stress affect the liver, gallbladder, and digestive function? Modern medicine explains this mechanism through the autonomic nervous system and the gut-brain axis. Chronic stress excessively activates the sympathetic nerve, which reduces blood flow to the digestive system and alters gastrointestinal motility. Furthermore, the stress hormone cortisol can influence bile production and flow. In particular, the brain and gut communicate closely in a bidirectional manner via the vagus nerve. When stress degrades vagus nerve function, gallbladder contraction and bile secretion may become irregular. This can trigger issues such as biliary dyskinesia or sphincter of Oddi dysfunction. If the gallbladder fails to contract on time, bile stagnates, potentially inducing pain in the right flank or upper abdomen. Because bile cannot properly emulsify fats, consuming greasy foods like fried dishes or meat leads to dyspepsia, fullness, abdominal distension, and even nausea. These symptoms overlap considerably with modern medical diagnoses such as functional dyspepsia and irritable bowel syndrome. This demonstrates that digestive symptoms occurring without inflammation or structural abnormalities can be aggravated by stress and psychological factors. In severe cases, stress and poor dietary habits elevate the risk of non-alcoholic fatty liver disease, in which fat accumulates in the liver, or alter bile composition to contribute to gallstone formation. In conclusion, flank pain and dyspepsia caused by Donguibogam's liver qi stagnation can be understood as modern ailments arising from the complex effects of stress, acting through the autonomic nervous system and gut-brain axis, on liver metabolism and gallbladder bile regulation. It serves as an important reminder that our body never functions in isolated pieces.