For patients undergoing kidney dialysis, the sudden surge of nausea often feels like a storm brewing in the abdomen—a tightness in the chest, a metallic taste lingering on the tongue, and a wave of cold sweat breaking across the forehead. From the perspective of traditional Chinese medicine (TCM), this discomfort stems from "heart fire" flaring upward, disrupting the delicate balance between yin and yang. The kidneys, considered the "gate of vitality" in TCM, govern water metabolism and anchor the body's yin energy. When their function declines, yang energy rises unchecked, creating internal heat that irritates the stomach and disrupts the harmony between the heart and kidneys. Modern medicine echoes this insight, noting that cardiovascular instability during dialysis—such as sudden drops in blood pressure or electrolyte imbalances—can trigger the vagus nerve, causing gastric motility disorders and nausea. This duality of "fire rising" and "vagal overactivation" forms the core of our understanding.
To address this, TCM emphasizes "nourishing yin to subdue fire" and harmonizing the heart-kidney axis. Herbs like rehmannia root (sheng di huang) and cornus fruit (shan zhu yu) replenish kidney yin, while lotus seed (lian zi) and lily bulb (bai he) calm the heart and stabilize the spirit. Acupuncture at points such as Neiguan (PC6) and Zusanli (ST36) regulates qi flow and suppresses gastric hyperactivity. Modern interventions complement these approaches: adjusting dialysis fluid temperature to prevent vasoconstriction, optimizing electrolyte gradients to reduce oxidative stress, and prescribing serotonin receptor antagonists to block nausea signals. Patients are also advised to monitor their "biological clock"—avoiding late-night dialysis sessions that disrupt circadian rhythms, as sleep deprivation exacerbates both heart fire and autonomic nervous system dysfunction. A practical tip: sipping warm ginger-honey tea (a natural antiemetic) during dialysis can soothe the stomach while aligning with TCM’s principle of "warming the middle jiao."
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