SORRY To Hear that,
Ok, there are nerves that comes from spinal cord
to the entire area of body so that sensation can be sent to the brain, from the peripheral parts of body.
The PULLING of the muscle sometimes gets accompanied with the pull of nerves exiting from the spinal cord and the stretching/ excessive pull on that nerve causes the problems in the nerve and the function of the nerve is tempered for good giving you signs of numbness
, burning, pain.
Get an better idea - the nerves are like electric wire that are use for wiring if the plastic insulator around wire gets broken of by some reason what happens ? I guess you are thinking short circuit. And that correct, so the short circuit in the electric connection breaks the circuit or damage the appliance some way the nerves which are the wires in human body acts differently in case of stretching and as a result give the symptoms you are mentioning.