bi do sock chan dong manh o phan kinh mach vung bung nen he mach cho~ do bi mat can bang nen bam vao 2 phan huyet o? than^ sau va` phan bung truoc sau do bam huyet vao cac day than kinh ben^ ben. de khai thong cho no hoat dong tot tro lai kem theo do tap luyen 1 so bai tap de giup no phuc hoi...