The pulse at the foot-yang position is floating and rapid. Floating indicates qi, while rapidness leads to rapid digestion and great hardness. When qi is exuberant, urination becomes frequent, and frequent urination leads to hardness. The interaction between hardness and rapidness results in consumptive thirst.

Note: The phrase "而大堅" lacks coherence. There should be the character "便" after "大," which must have been omitted during transcription.

bubble_chart Annotation

The foot-yang pulse is the stomach pulse. When the stomach pulse is floating and exuberant, pressing it reveals rapidness, indicating stomach qi heat, hence the rapid digestion of food. When fire is exuberant and digestion rapid, the stool must be hard. When qi is exuberant and water is consumed, urination must be frequent. Therefore, frequent urination leads to hardness, and the interaction between hardness and rapidness results in the disease of consumptive thirst due to rapid digestion.