《伤寒论·平脉法》
寸口脉微而涩，微主卫气虚，涩主营气不足。
寸口脉微而涩，微者卫气衰，涩者荣气不足。
The pulse at the cun position is weak and rough, the weakness indicates that the defending qi is deficient, and the roughness indicates that the nourishing qi is insufficient.