Herniation

has anyone gone from no herniation noted to herniation noted on mris? I was told i have chiari after an accident. I had an mri 3 years before that and it didnt show i had chiari.

I was curios if anyone has ever been in this situation that a doctor may have told them rhe answer why hernation occured? I figured the auto accident made the chiari worse. My firdt symptom after the accident was tremors all ovet. After 2 years i still have them in my left arm and sometimes in my legs