Brief Answer:
Due to
disc prolapse.
Detailed Answer:
Hello,
Thanks for posting your query.
The pain in the lower back travelling down the legs on standing is due to a disc prolapse at L4-L5 and L5-S1. Since the MRI was done almost two years ago, the degenerative changes are likely to be progressed causing a mild
nerve root compression at these levels. These are age related degenerative changes of the spine.
The treatment is done according to the severity of symptoms. If you have only one symptom-
back pain shooting to the legs with no nerve related symptoms like limb weakness, numbness,
urinary incontinence, etc then medicines along with
bed rest are the first line treatment along with
physiotherapy. Regular physiotherapy helps in preventing further progression of the problem.
You need to get some good muscle relaxants like Thiocolchicoside prescribed in combination with a potent pain killer for releif. Doing back strengthening exercises and lumbar traction will also help in reducing the symptoms. Do consult with your
neurologist and get a latest MRI scan done for proper evaluation.
I hope this answers your query.
In case you have additional questions or doubts, you can forward them to me, and I shall be glad to help you out.Wishing you good health.
Regards.
Dr. Praveen Tayal