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Lower back pain. The pain can be sudden and sharp or a persistent, enduring ache. Acute low back pain tends to last from a few days to one month. Subacute pain ranges from four to 12 weeks. Chronic pain lasts longer than three months. About one in five cases of acute pain develops into chronic pain.
Upper back pain. Although less common than lower back pain, upper back pain can be just as uncomfortable. The pain focuses on your shoulders and neck.