In addition, jamming or hyperextension all through pursuits that require catching or hitting an object can result in excessive stretching or tearing of the tendons. Repetitive pressure from specified sporting activities or things to do could cause don and tear, earning the tendons far more susceptible to injury. 麻木和刺痛： 受损神经所支配的区域失去感觉，常伴有刺痛或“针刺”感。 https://www.theorthopaedicandpainpractice.com/why-cant-i-straighten-the-tip-of-my-finger/