Numb

Fifteen years ago I was perched awkwardly on a telephone exchange ladder for too long in one position, identifying faulty circuits in a cable replacement job. This resulted in permanent nerve damage to all toes bar the big one on each foot.
I've done something (unidentified) today to trigger major numbness in the toes of my right foot. It's not sciatica, I know that sensation of old, this is quite different and feels plain weird.