题目内容

Four natures, also known as four qi, refer to the four different medicinal natures, such as cold, heat, warm, and cool, which reflect their effects on the human body.

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Medicinals of sour flavor have the function of astringing and arresting discharge. Most of them are used to treat excess patterns or diarrhea.

Medicinals of salty flavor have functions of softening hardness and soothing sore throats and relieving constipation by purging. Most of them are used to treat scrofula, hard masses, and constipation.

Medicinals with ascending and floating function move inward and downward, and may have the function of raising yang, relieving exterior patterns, or causing resuscitation.

In clinic, for nontoxic medicinals, large doses with long term use should be avoided; otherwise, a nontoxic substance may become toxic.