7a4039fb_us_Back_Problems_and_Red_Flags__Red_flag_sign
[Why we are interested] This may be a sign of cancer.The key word here is unexplained, if you have lost weight because of diet or exercise or because pain and worry has been reducing your appetite that is not such a concern. If you have lost weight and you have no idea why this may be a sign of more serious back problems. [Red flag sign] 
Recent unexplained weight loss
Serious Back Problems and Red Flags
Red flag sign