Back spasms are common and increase with age. Sudden painful tightening is actually an involuntary contraction of the back muscles. Back spasms usually occur in the lower back. Although most people may experience spasms only occasionally, some people deal with chronic spasms that often occur. Spasms are usually felt after sudden back movements, such as bending or twisting. Because some people sit too long and cause back cramps. Inflammation of the back nerves or muscles can cause spasms.
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Back spasm is very common and increases with age. Sudden painful tightening is actually an involuntary contraction of the back muscles. Back spasms usually occur in the lower back. Although most people may experience spasms only occasionally, some people deal with chronic spasms that often occur. Spasms are usually felt after sudden back movements, such as bending or twisting. Because some people sit too long and cause back cramps. Inflammation of the back nerves or muscles can cause spasms.