This sort represents a pure tendinous injury wherever the extensor tendon is stretched or torn, but no bone is damaged. The hurt happens to your smooth tissue connecting muscle mass to bone, causing the inability to straighten the fingertip without assistance. Scleroderma: This can cause calcifications inside the skin and https://www.theorthopaedicandpainpractice.com/why-cant-i-straighten-the-tip-of-my-finger/