Is there a complete cure for fibromyalgia?

Recently, my mother has been experiencing severe pain in her hips, shoulders, and legs. The pain persisted, so I went to the hospital and was told it was likely fibromyalgia. She said she was already taking a lot of medication and didn't want to add fibromyalgia medication. I'm worried. Can exercise alone help with this without medication? Can fibromyalgia be completely cured?

If you know of a method, please advise.