It's been almost 1yr since my 2nd MiraDry treatment and I still have numbness in my arm and fingers. Will this go away?

Numbness is usually transient. I would discuss your concerns with your surgeon to determine if there is any scar tissue that may be predisposing you to the problem. Best, Dr. Karamanoukian Los Angeles

You will probably not improve after one year.  So sorry that you had to be one of the unlucky patients to experience this.  The treatment protocol has improved with tumescent fluid and this problem is no longer an issue.

Numbness is a common but transient effect from the miraDry procedure.  Usually if the nerve has only been temporarily injured, it should return in the matter of days, weeks or months depending on the degree of injury. If it does not come back after a year, then it is unlikely to gain significant improvement. The only reason you might have some slight improvement, is if some of the neighboring nerves are growing into the area where you are numb.