There is no specific reason. In ancient times, he was able to raise his medical skills to that height. I firmly believe that he must be a genius. However, it is recorded in the history books that Hua Tuo recited ancient books such as Shangshu, Shijing, Zhouyi, Book of Rites and Chunqiu. He practices medicine to save people, and has no teacher's biography. He mainly studied the medical classics of the previous generation and made continuous progress in practice. At that time, China's medical science had made some achievements, such as Huangdi Neijing, Huangdi Eighty-one Difficult Classic, Shennong Herbal Classic and so on. He was born in a noble family in the countryside. Although he has declined, he is at least richer than ordinary people.
Nothing more than three factors: extremely diligent, extremely intelligent, and have a certain family background.