Old mule

Thank you very, very much for clarifying all of that. So it definitely sounds like two separate issues.
Is the anti-inflammatory a steroid or a supplement?

If that's all he's on here's what I would do:
A massage therapist won't hurt, it'll help a great deal with the pinched nerve, but won't make a difference for the arthritis.
He's probably walking more outside because he can make wider turns. Tight turns will be hard on him - but you'll just have to live with that, he's old that's what happens.
To help him with his arthritis these are a few supplements you can look into and choose between:
My favorite is MSM here's some details on it: Vita Flex MSM - Equine Anti-Inflammatory Supplements from SmartPak Equine
This is a great mix of MSM, glucosamine and some other great joint supplements:Vita Flex MSM - Equine Anti-Inflammatory Supplements from SmartPak Equine
There's also cosequin which is highly regarded - I would get this, with MSM added:Cosequin® Optimized with MSM - Equine Joint Supplements from SmartPak Equine

Look into those, ask your vet what they think about those and pick whichever would be best for your particular mule :)

Arthritis really stinks, there's not much you can do to reverse it, but you can help support it and help him deal with it.
Good luck

Yay im glad I clarified that, Now I have had him on msm but it didnt seem to agree with him...

Sadly yesterday we came a cross somthing horrible, we went outside to do the late night feed and ned was VERY VERY sore it was really sad and if he were to slip he would have died that very night. So we put him in our indoor arena with hay and water and he's been int here over night.
During the day we put him out in our field with our other old horse :)

I am sure you aare wondering why he was so sore well the anti inflamitory we were giving him wasnt helping much so we called the vet like I said and he said to double the dosege so that's what we did...

Ned had a recation to the drug and it was so bad we were going to put him down int he moring, what we did that night was give him a whole tube of flenixin and the next moring,

BAM INCREDIBLE SHAPE!!! He jasnt been this good for months!!!! We put him the the arena and he sis staying in there probely for the winter ( but note he does go out in the field with his friend during the day)

The reason it is so good is because he got flenixin ( that stuff works wonders)
He got his blanket off because he didnt need it in the arena ( the blankey hurt his shoulders )

The arthritis wasnt so bad because he was warmer!!
I have much more hop now, it feels so good to be able to sleep at night knowing that he isnt going to slip and fall!!

Thanks to all I am going to send you mail about somt questions you asked