Hi,
It looks as if you have a
slipped disc at the L5/S1 level which is compressing the
sciatic nerve root. From the
MRI description, it is likely that your
sciatica will be more on the left than the right. Further, there are degenerative changes seen on the level above as well, though not as serious as the one below. You need to be assessed by a surgeon who deals with these problems to what the clinical findings are. After correlating your symptoms with the findings and MRI, he/she will basically lay on the table 3 options:
1. painkillers and other non interventional measures
2. Nerve root block
3. Surgery
The order in which the 3 are offered to you depends on your symptoms, clinical findings and MRI picture. Most sciaticas settle down after a few weeks with painkillers etc and that would usually be the first course of treatment for the vast majority of patients.
Hope this helps