What she needs is an expert in spinal health. That's what chiropractic is.
An activator would be good. But any good chiropractor should be able to help her. There might be a little sting at the time of the adjustment but the improvement is almost immediate.
Diet is also important to the "achies". Omega 3's, butter, olive oil or flaxseed oil everyday, and plenty of distilled water go long way to minimize the joint discomfort.