I am 21 years old male, I am suffering from back pain since last week .the pain comes backside of abdomen above hip. The pain occurs when bending forward and backwards. A small stone in my kidney was formed two months ago ,i have not removed the stone yet. Is that a reason for back pain or any other reason. Please let me know the reason for the pain and suggest me how to reduce or avoid the pain .is back pain a serious issue.