字幕及翻譯：

a back spasm is a sudden and involuntary  contraction of the muscles in the back, often causing pain and discomfort. it can  be caused by a variety of factors  including overuse of the muscles, sudden  twist or turn or sometimes due to a  herniated discs or arthritis.  back spasms can range in severity from  mild discomfort to severe pain and can  last anywhere from 24 to 72 hours. it can  also be accompanied by other symptoms  such as muscle stiffness difficulty  moving or standing up straight and even  numbness or tingling in the affected  area.  for management of the back spasm,  complete bed rest is not recommended. ice  pack or heat therapy would be  recommended following a gentle Mobility  exercise routine for pain management.  

背部痙攣是背部肌肉的突然和不自主的收縮,，經(jīng)常引起疼痛和不適,，可能由多種因素引起,，包括過(guò)度使用肌肉突然扭曲或轉(zhuǎn)動(dòng)，有時(shí)是由于椎間盤突出或關(guān)節(jié)炎引起,。背部痙攣可根據(jù)嚴(yán)重程度分為輕度不適到劇烈疼痛不等,，疼痛可持續(xù) 24 到 72 小時(shí)不等，還可能伴有其他癥狀,，例如肌肉僵硬,，難以背部移動(dòng)或站立直立，甚至在受影響的區(qū)域 出現(xiàn)麻木或刺痛感,，不建議完全臥床休息來(lái)控制背部痙攣,，冰敷或熱療可同時(shí)配合溫和的活動(dòng)鍛煉進(jìn)行疼痛管理。

重點(diǎn)詞匯總結(jié)：

spasm /?sp?z?m/n. 痙攣,；抽搐,；發(fā)作

involuntary /?n?vɑ?l?nteri/adj. 無(wú)意識(shí)的；自然而然的,；不知不覺(jué)的

herniated discs 椎間盤突出

herniate/?h??rn??et/v. （器官）成疝,，突出

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