Prayers.
I’ve included him in my prayers too.
Might I also suggest what is usually a last alternative in doctors should actually be our first. Have him go see a good chiropractor - only one who does x-rays 1st.
I felt that God indirectly led me to a chiropractor many years ago and it was the best thing for me physically - releases God’s innate healing properties from within the body - much better than medicine or surguries.
If you doubt please read:
Chicken Soup for the Chiropractic Soul
a hard-to-find book - normally have to order from the internet.