Welshy I may be wrong but I thought sciatica was nerve pain.
For many years maybe 30 years, I suffered from hip pain which GP said was arthritis. Gradually got worse until 2 years ago I was using a stick. One year ago after I'd been crying/screaming for two days with pain my husband called for an ambulance. They needed to give me gas and air to get me down the stairs and I was admitted for 3 weeks while they tried to ease the pain. MRI and CT Scan showed spinal stenosis and nerve compression plus osteoarthritis etc. I was in too much pain for physiotherapy and because I couldn't actually stand unaided Physio couldn't help. I was discharged after 3 weeks, home by ambulance so I could lie flat, with a zimmer as a walk aid, and a hospital bed installed. I've been prescribed morphine together with other pain relief.
I am much better although still in pain, a combination of time and pain relief
I can use a stick around the house and a rollater if I go out. Attendance at the pain clinic and their 5 steroid injection treatments hasn't helped so far..
My pain is on the left lumbar, left hip joint, back of left thigh, left calf and into my left ankle bone. It has been referred to as sciatica. Which I understand to be compression of the sciatica nerve.
Hence my belief that sciatica was nerve pain. I could be wrong in my understanding and am happy to be advised otherwise.
Grannydaisy nerve pain is excrutiating and I wish you well.