It would not hurt to look into the zapper for this ailment and any other, imho.
don croft makes one that is inexpensive and super easy to use. I do not sell
this or anything else, but have used one for 15 years and it has relieved the
pain of osteoarthritis in my hands and has taken down swelling and redness
during that time. My neighbor has had at least 2 surgeries and now has paddles
for hands and still hurts all the time. I told her about it three times and
then saw it was no use. Best wishes, pj