Radix Scrophulariae is the dried root tuber of Scrophulariaceae. Has the effects of clearing away heat, cooling blood, nourishing yin, reducing pathogenic fire, removing toxic materials and resolving hard mass. For febrile diseases, body heat at night, upset and thirsty, red tongue and rapid pulse; It can also be used for delirium caused by pathogenic factors entering pericardium due to epidemic febrile diseases; Also used for fever, burn of qi and blood, and macula; It can also be used for treating yin injury caused by fever, dysphoria, excessive fire due to yin deficiency, bone steaming and hot flashes, etc. Can be used for treating sore throat, conjunctival congestion, carbuncle, swelling and sore. In addition, it can also be used for constipation due to yin deficiency and intestinal dryness.