Iincreasing spasticty

Hello! My question is, it common for spasticity,in the form of muscle stiffness,to develope years after injury date? Could really use some insight on this.Had mri done,doctor said unchanged from preveuse image in 6/12/14,I do have a pitch nerve in c6 c7 mild emproachment docter said would have no affect on my legs.

Thanks

Iincreasing spasticty