<unk>  is classified in terms of duration of symptoms. # Acute<unk>  lasts <6 weeks # Subacute<unk>  lasts between 6 and 12 weeks. # Chronic<unk>  lasts for greater than 12 weeks.
Back pain
Low back pain
Radicular pain
Pelvic pain
Xiphodynia
Pelvic girdle pain
Knee pain
Middle back pain