A massage would be nice but the real problem with a massage for his problems at least is that they are only getting to half the muscle and the rest is still tight. That ends up tightening the muscle back up in a few hours and all the pain is right back where it was originally. That keeps those who give the massages in business.
If you want to really help him here are a few muscle releasing methods that do just that, release the whole muscle. When that is done the pain will be gone and for a period of time, not just for a few hours. Here are the ones he will benefit from most:
Neck
Invert your hands and put them next to your head placing your thumbs in under your ears and your fingers behind your head. Squeeze together and hold until the muscles release. Then slowly lower your head until your neck is fully extended, release the pressure but hold your head there for another 30 seconds.
With your neck in the bent position, replace your thumbs in under the ears and your fingers behind your neck but right next to your skull this time. Press your fingers and thumbs together again and hold. Relax your body while waiting. When the muscles have all released, slowly lift your head until it’s level again, release the pressure but hold your head like that for another 30 seconds.
Back::
Place your left hand on your left leg next to your body. Place your right hand over your left shoulder and find the muscles next to your spine and press on them and hold. After 30 seconds slowly lower your body forward, keeping your left arm fairly straight as you do. When you reach your lap remain there for another 10 seconds, release the pressure but remain there for another 30 seconds. Then reverse your hand positions and do your right side.
One last thing, I hope I didn't read it wrong but is his back super sensitive to just the touch? I know I have a cousin that way and he refuses to let anyone touch his back even though I know this would help him. the thing is one day I just put my hand on his shoulder and he jumped in pain. I found out how bad of shape he is in but he's stubborn too so maybe in time he'll come around to finding peace with his body.