Hello,Thanks for your query.After going through your query I came to know that you probably are suffering from lumbar disc prolapse. It is already confirmed by MRI scan. Intervertebal disc desiccation at L5-S1 level means disc between L5 and S1 vertibrae is somewhat dry. Right posterolateral disc extrusion at l5-s1 level causing grade iii thecal sac and right root compression means disc between these two level came out of place backwards and outwards and it is compressing spinal cord covering(dura) and right sided nerve root severly.There are two treatment options.First option is Rest in position of relief(generally lateral position with both knee bend),NUROKIND GOLD ONCE DAILY and analgesics (Diclofenac three times a day after meals is effective). Sometimes strong analgesic(such as ultracet three times a day after meals) is required. OMEPRAZOLE before meals prevent acidity caused by analgesics . This method needs patience as it take longer treatment times sometimes up to 6 months.Second option is go for surgical operation(Discectomy). You can discuss with your treating Doctor about it.I do hope that you have found something helpful and I will be glad to answer any further query. Take care.