Mid back pain that gets worse when use arms?

Muscle spasm: That sounds like paraspinal muscle spasm, which is slow to heal but is helped with resting your back, moist hot compresses to relax muscles, Ibuprofen and lyrica (pregabalin). However, check with your doctor for other conditions. Red flags to be aware of include weakness in your legs, loss of bowel or bladder control, or numbness in the saddle area, as these could indicate serious conditions.