Why did Princess Zhu Huan, Lagerstroemia speciosa, fall to the root of the disease after being stabbed?

The reason why Lagerstroemia speciosa fell ill with a knife is because the wound of Lagerstroemia speciosa is really unclear. After returning to the palace, Jinsuo examined Ziwei's wound in her boudoir. As she watched it, she said with distress that this scar will probably remain forever! As you can see, Wei Zi was badly hurt. The medical level in ancient times was not as developed as it is now. If it is stabbed near the heart, the medical treatment is not timely and the treatment is not thorough, which will naturally lead to the root cause.