Thanks for your question on Healthcare Magic.
I can understand your concern.
Fibromyalgia can cause muscular spasm.
So when you massaged that muscle, it releases and you feel better.
So possibility of back muscle spasm is more likely in your case.
So follow these steps for better symptomatic relief in muscular spasm.
1. Sit with proper back support.
2. Avoid sudden jerky movements of back and forward bending.
3. Avoid heavyweight lifting and strenuous exercise.
4. Apply warm water pad on affected areas.
5. Take
muscle relaxant thiocolchicoside if needed.
6? Take calcium and vitamin d 3 supplements.
Don't worry, you will be alright with all these.
Hope I have solved your query. I will be happy to help you further. Wish you good health. Thanks.