Going to er for back injury. will x-ray show herniated disk? mris not done in local er, unsure if muscle or disk is problem.

No: a regular X-ray will not show a herniated disc. it may show disc space narrowing which is suggestive of disk disease. A CT may or may not show a herniated disc but an MRI will show a herniated disc.

Not X-rays MRI rec'd: MRIs for the lumbar spine are not usually urgent, thus it would be a good idea for you to see your primary care MD or a spine specialist who can order this. In young people usually back pain is a muscle issue as the discs are only likely to be bulging. The typical treatment is Physical therapy for core strengthening and muscle relaxants or anti-inflammatories as needed for symptomatic relief.