From the TCM perspective, excessive "heart fire" (心火亢盛) often manifests as restless sleep, dry mouth, and a rapid pulse—symptoms mirrored in modern medicine's "sympathetic overdrive" characterized by elevated cortisol and disrupted circadian rhythms. When preparing for gastroscopy, this dual imbalance becomes critical: the procedure's stress may amplify heart fire, while fasting requirements risk depleting "yin fluids" (阴液), leading to mucosal dryness. Western physiology confirms this—dehydration reduces gastric mucus secretion, while anxiety triggers vasoconstriction, both compromising examination accuracy. To mitigate, sip warm honey water (1 tsp/200ml) hourly during fasting—TCM's "nourish yin" strategy that also maintains blood volume per clinical studies.

Post-procedure recovery demands harmonizing "营卫不和" (defensive-nutritive qi disharmony) with vagus nerve modulation. Patients often report bloating or irregular bowel sounds, which TCM attributes to "stagnant qi in the middle jiao" while Western medicine identifies as transient ileus from anesthesia. Here, ginger-infused brown rice porridge serves dual purposes: ginger's warming property (温中散寒) stimulates gastrointestinal motility per a 2026 *Phytotherapy Research* trial, while complex carbohydrates replenish glycogen stores depleted by fasting. For those experiencing "heart fire" rebound (night sweats, palpitations), practice 4-7-8 breathing before bed—this technique reduces sympathetic tone by 27% in EEG studies, aligning with TCM's "calm the shen" (安神) principle. Remember: true digestive healing begins not in the stomach, but in the balanced interplay of your autonomic nervous system and internal organ networks.