好的白癜风专科医院 http://pf.39.net/bdfyy/Description概述Adiskbeginstoherniatewhenitsjelly-likenucleuspushesagainstitsouterringduetowearandtearorasuddeninjury.Thispressureagainsttheouterringmaycauselowerbackpain.当椎间盘果冻状髓核由于磨损或突然受伤挤压外环时，可致椎间盘突出，施加在外环上的压力可导致腰部疼痛。Ifthepressurecontinues,thejelly-likenucleusmaypushallthewaythroughdisk’souterringorcausetheringtobulge.Thisputspressureonthespinalcordandnearbynerveroots.Inaddition,thediskmaterialreleaseschemicalirritantsthatcontributetonerveinflammation.Whenanerverootisirritated,theremaybepain,numbness,andweaknessinoneorbothofyourlegs,aconditioncalled“sciatica.”如果压力持续存在，髓核会一直挤压间盘的外环，导致外环膨胀，这会对脊髓和附近的神经根造成压力。此外，椎间盘会释放化学刺激物，导致神经炎症。当神经根受到刺激时，一侧或双下肢可能会疼痛、麻木和无力，这种情况称为“坐骨神经痛”。Cause病因Aherniateddiskismostoftentheresultofnatural,age-relatedwearandtearonthespine.Thisprocessiscalleddiskdegeneration.Inchildrenandyoungadults,diskshavehighwatercontent.Aspeopleage,thewatercontentinthedisksdecreasesandthedisksbe