Accidental benefit from Stinging Nettles.

My wife has suffered for many years with a weak wrist and hand frequently causing her to lose her grip on objects she was holding. Recently, when in the garden weeding, she accidentally grabbed a bunch of nettles with her "weak " hand. The following day she was complaining about the tingling in the hand but has since been delighted to find that the grip and mobility of her hand is now normal. It is now more than a week since the episode and her hand continues to be "cured".
If you have a similar problem it may be worth a try.