What does a torn tendon feel like?

Pain: Pain and inability to move the joint that it crosses.

Depends upon : Where it is but pain, loss of motions, decreased power, swelling, balck and blue are all suspect for an acute tear. A chronic tear may feel different and just show up as swollen tissue followed by a change in motion that may not be noted right away, if one suspects a tron or ruptured tendon it is importnat to seek treatment as acute repair may be indicated and it may not be even a few week s later.