Lower back pain – WikEM

Pain lasting >6wks is risk factor for more serious disease; Night pain and unrelenting pain are worrisome symptoms; Back pain in IV drug user is spinal infection until proven otherwise; 95% of herniated discs occur at L4-L5 or L5-S1 (for both pain extends below the knee) Lumbago: acute, nonspecific back pain

https://wikem.org/wiki/Lower_back_pain