<p>Gan Cao is indicated not only for pain, but for also upward counterflow, vexation, palpitations, cough, fright mania, sorrow, hard glomus, and diarrhoea. For acute pain, Zhang Zhongjing always uses Gan Cao. If the pain is severe, the amount of Gan Cao increases. There is a saying, &ldquo;When there is acute pain, use a sweet herb and the pain will be relieved&rdquo;.</p>
