To Observe the Clinical Efficacy of Traditional Chinese Medicine Compound(Weipi Formula ) in the Treatment of Epigastric Stuffiness Syndrome

Inclusion Criteria: * ① Meet the diagnostic criteria for epigastric fullness (Pi-Man) in Traditional Chinese Medicine (TCM); * Meet the Western diagnostic criteria for functional dyspepsia (FD), specifically postprandial distress syndrome (PDS) subtype, or meet both PDS and epigastric pain syndrome (EPS) subtypes but with PDS as the dominant presentation; * Age 18-80 years; * Willing to sign the informed consent form. Exclusion Criteria: * ① Gastroscopy findings: Benign or malignant digestive diseases (e.g., peptic ulcer, gastric cancer); * Severe organic diseases of the liver, gallbladder, spleen, or pancreas; * Severe organic diseases in other organ systems; * Pregnant or lactating women; ⑤ Patients with psychiatric disorders causing similar symptoms (e.g., schizophrenia, anxiety disorder, major depressive disorder); ⑥ Regular use (≥3 months) of NSAIDs and/or selective COX-2 inhibitors; ⑦ Potassium supplements taken within 2 weeks prior to enrollment.