I would notr have actual numbess,but a feeling of numbness in my left hand. Meaning that it felt numb,but if I poked it with a sharp object I could still feel it, or a tickle. So I first had to distinguish between actual loss of feeling,and a feeling of numbness.

It has happened to me on several occassions with my fingers on left hand. It has always resolved. Longest it's lasted was about 2-3 weeks. It generally resolves,it may even be healing as well.