Hi, doctor, my lower back starts aching if I stand a lot. Actually at my work , I stand the whole time approximately 6 to 8 hours and I work really hard... after like 4 or 5 hours I feel this pain in my back in the two kidney areas....if am not working for a couple days and not standing continuously this pain won t appear. Whenever this pain comes in, it feels very uncomfortable to stand. it feel like my body is gonna fall apart at my lower back..and I will have to bend my body..I am afraid if this has to do anything with my kidney. Do you have any suggestions?... sincerely, elizabeth