"A hundred days' injury to tendons and bones" means that it is a long process that all the pain caused by tendon fracture cannot be fully recovered without treatment for a hundred days. "Bone" refers to bones, while "tendon" refers not only to tendons, but also to soft tissues such as muscles, fascia and ligaments.
Source: Chen Yinque and other biographies of the Tang Dynasty 90 times: "Cousin, people often say that' it hurts the bones and hurts the sky', and that boy's arm was smashed twice by you. Now it is absolutely impossible."
This sentence is a simple summary of the recovery time of fracture or tendon injury caused by trauma by ancient Chinese doctors under simple medical conditions. In ancient times, there was no anatomy, no sewing machine and no surgery. Ancestors rely on their hands to restore their bones and muscles, fix their forearms, and combine motion with motion. After a long period of practice, they came to the conclusion that this is the crystallization of the wisdom of their ancestors.
From the perspective of modern pathophysiology, the repair of bones and soft tissues needs to go through three periods, namely, hematoma organization period, callus formation period and reconstruction period, which takes about three months, that is, about one hundred days. This further proves that "it takes a hundred days to hurt the muscles and bones" is reasonable.
Many factors will affect the speed and quality of healing, such as the location of fracture or tendon or ligament injury, the scope and severity of trauma, the patient's age and even gender, physical health, nutritional status and appropriate treatment. Coupled with the individual differences of people, therefore, not everyone is in line with the conclusion that "it hurts the muscles and bones for a hundred days" and cannot be too true.