Actually you have sparking in my aging brain something.

When I was involved in a weapons group, I was struck on the right shoulder near my neck with the rattan stick. This caused a nerve pinch which lasted a week or so - lost all full power in the right hand.

Another time, I was struck on the outside of the right forearm.

This caused a loss of circulation in the forearm (apparently bleeding inside the 'capsule'), which eventually ended up as 'anoxia' - inability of the muscles to do any work without instantly running out of energy and exploding in pain. In desperation after a few days, I tried something - immersed the whole forearm to above the elbow in ice water till total numbness set in. I let it warm up and then repeated this a few times - basically till I could stand this no more!

The problem eased almost immediately - normal circulation was restored! Lucky it didn't progress to gangrene! The 'treatment' seemed to force blood out and in of the 'capsule' surrounding the muscles, or somehow alleviated the obvious blood clot.