After having a discectomy last year I am still getting sciatica and back pain. I ve had a nerve block but still get pain abs worse with a full bladder

Speak with Surgeon. Recommend speaking with surgeon to discuss your pain issues. While pain may be normal after surgery, sometimes when pain increases above normal status, then evaluation may be needed to make sure no complications has arisen. Otherwise seeing pain/spine specialist may provide more answers.
Need Evaluation. You must get this checked sooner rather than later, especially if your bladder is involved. You could have another disc from a different level or scarring from the previous surgery.
Pain. There are medication which are used to treat neuropathic pain. Talk to pain specialist or neurologist.