What’s the difference between chronic back pain and sciatica?

I he experiencing strong consistent bk pain lg remember (I 25 now). starts wh little discomfort lower back, 20 minutes later, don't pain medication, joints start ache (my hip, knee, ankle). X-rays sw se minor scoliosis compressed disc (L4 L5). far, orthopedic surgeons reluctant te seriously be I'm "not lot pain."

My question is, compressed disc? I've heard mention sciatica idea tt is. usually catch bad, takes 4 pills day (Excedrin, Advil, etc) don't that's gd term answer.

And, question - doctor te seriously?