if my hb is low can it give me a backache my hb is around 11 i seem to be getting back pain all the time when i walk, so i cant walk far, but when my hb was 13 i could walk any were and far, i have kidney failure, and the doctors dont like it to go above 12, please help me, the doctors keep saying i need to see a back doctor, they wont listen, is every one difrent when it come to there hb