Guan Yu was injured and went to see Hua Tuo for medical treatment. Why did Hua Tuo tell him not to sit down?

This is actually a meme on the Internet. Hua Tuo said to Guan Yu on the Internet, don’t sit down if you are injured. In fact, the homophonic pronunciation is business seats. Guan Yu said, do you still have first-class seats? Historically, Hua Tuo treated Guan Yu's injuries by scraping his bones. During the Three Kingdoms era, Wei, Shu and Wu fought fiercely. Once, when Guan Gong led his army to attack Cao Bing, his right arm was hit by the enemy's poisonous arrow. The generals asked Guan Gong to return to Jingzhou for treatment, but Guan Gong refused, saying: I can't miss important military and state affairs because of a small injury. Everyone had no choice but to look for famous doctors from all over.

One day, a doctor named Hua Tuo came. He said that he heard that Guan Gong was hit by a poisonous arrow and came here to treat him. At this time, Guan Gong's right arm was in severe pain, and he was playing chess with Ma Liang to distract his attention, so as not to show his painful expression and disrupt the morale of the army. Hua Tuo saw Guan Gong's arrow wound and said: If the king's arm is not taken care of, I'm afraid it will become useless! If we want to cure it radically, we have to tie the prince's arm firmly to the pillar. Then I use a knife to cut the skin and flesh to the bone, scrape off the poison on the bone, then apply medicine, and use a thread.

Suturing is the best way to cure it, but I am afraid that the emperor will be afraid of it. After hearing this, Guan Gong laughed and said that he was not a worldly person, he was not afraid of pain, and he did not need to tie his arms to the pillar. He also ordered people to bring food first, saying: "Sir, you have come from afar, please have wine and food first!" Guan Gong accompanied Hua Tuo. After eating for a while, he stretched out his right arm and said, "please take action now. I will still play chess and eat and drink. Please don't take offense, sir!" Hua Tuo said no more, took out a sharp knife and asked someone to hold it in Guan Gong's arm. He put a basin down, looked at the location, and cut Guan Gong's skin and flesh with a knife. Guan Gong ate and drank as usual, Hua Tuo calmly said: "I will use a knife to scrape the poison from the bones of the prince, and that will be fine!"

Hua Tuo's technique was skillful. As soon as he finished speaking, his hands The knife on Guan Gong's arm was scraping back and forth, making a squeaking sound, and the blood almost filled the entire basin. When the soldiers saw this situation, they also hid their faces and became pale, but Guan Gong continued to play chess, eat and drink without changing his face. Soon, Hua Tuo scraped away all the poison, applied medicine, and sutured the wound. ?