question: Hello sir, I have back pain and my and my left knee having pain..some times i feel stiff ness..and my kamar is becomes thinner from last 8 months...i am 33 yr old..some times neck pain...what should i do..in my x ray doctor say ..nothing is there..but i have vitamin D deficiency..is it arthrites..plz help me.i am tensed. Regards Santosh mahakud 0000