Back pain can be relieved by taking ibuprofen. Sometimes a muscle relaxer is needed as well. Alternating heat and ice will also help.
Rest the body as much as possible when you have back pain.
To relieve lower back pain try using a hot water bottle or heat pads. This should ease the discomfort, but not cure it, so if it persists for a month then see your doctor. Taking painkillers will help reduce and swelling or inflammation that there be.
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