Compression of the nerve means that the nerve is compressed in the body, such as by soft tissues, by intervertebral discs, or by tumors. Once the nerve is compressed, the distal muscles of the innervated nerve will be atrophied, and the corresponding limb movement disorders and pain will occur. The most common clinical nerve compressions are: first, lumbar disc herniation, which can stimulate the nerve roots and produce pain, numbness and limited movement in the innervated area. Secondly, carpal tunnel syndrome and elbow tunnel syndrome can also be seen clinically, which are also symptoms of nerve compression. Carpal tunnel syndrome is caused by compression of the median nerve at the carpal tunnel, resulting in numbness, limited fine motor movement, and pain in the hand.