I Became the Divine Physician Hua Tuo, and Cao Cao Tried to Behead Me from the Start

If he says one more word, Cao Cao will have his head chopped off. A neurosurgeon transmigrates as Hua Tuo and opens his eyes in the Sikong's residence in Xudu. Cao Cao is reclining on a couch. He's had a headache for seven days, and asks, “Sir, can you treat it?” He can. He knows exactly what the illness is: increased intracranial pressure. But there's only one way to treat it: open the skull. And in Romance of the Three Kingdoms, that's exactly what Hua Tuo said before Cao Cao had his head chopped off. At the end of the Han dynasty, there are no sterile conditions, no anesthesia monitoring, and no one has even heard of bacteria. Opening the skull is tantamount to murder, and the victim would be Cao Cao. If he doesn't operate, in ten days it will be his own head on the chopping block. All he can do for now is take out a needle. One prick, and a headache that had lasted seven days vanishes at once. Cao Cao narrows his eyes. “Sir, if your skills are so miraculous, why not cure me once and for all?” He has hands that can save lives, and an answer that will get him killed if he says it aloud. In ten days, he must use a needle and a blade from the late Han to tackle an illness that won't have a reliable solution for another two thousand years.