A spasm is a spontaneous, abnormal contraction of a muscle. When it occurs in the back near the spinal cord or the nerve roots, it can be very painful.
A spasm is a spontaneous, abnormal contraction of a muscle. When it occurs in the back near the spinal cord or the nerve roots, it can be very painful.
所谓背部痉挛是背部肌肉的突发非正常收缩。如果正好发生在脊椎或神经附近的话会非常痛苦。