A patient has sharp and stabbing pains in the epigastrium worsened by heat, pressure, and eating, with a purple tongue. What is the Stomach zang-fu pattern?

The symptoms presented in this case indicate Stomach Blood Stasis as the most appropriate pattern. Sharp and stabbing pains in the epigastrium that worsen with heat, pressure, and eating suggest an obstruction or stasis of blood within the stomach. The description of these pains is consistent with the nature of blood stasis, which often manifests as sharp, localized discomfort.

Additionally, the presence of a purple tongue is a significant diagnostic indicator. In Traditional Chinese Medicine (TCM), a purple tongue typically reflects stagnation of blood or qi. A tongue that lacks color, which can be associated with deficiencies, does not fit this presentation.

In contrast, other conditions like Stomach Yin Deficiency would show more signs related to dry mouth and increased thirst, and Stomach Fire would typically lead to symptoms of burning pain, severe thirst, and possible changes in digestion. Stomach Phlegm-Fire would exhibit a more complex symptom picture including nausea, vomiting, or a feeling of heaviness. Therefore, the patient's symptoms align more closely with Stomach Blood Stasis, confirming it as the correct diagnosis.