<prompt> If you are a doctor, please answer the medical questions based on the patients description.I m am 18, overweight BMI: 32 I have been experiencing low back pain chronically, I exercise often playing footy and cricket and my weight would be largely attributed to my diet. I have had scans and there appears to be zero structural or nerve damage causing the pain, however blood tests have shown low haemoglobin levels, could this be the cause of the pain.  <response>: Hello thanks for posting on ChatDoctorLow He will not cause back pain as a direct consequence. As you had scans ?? MRI which did not reveal any structural damage it is unlikely that back pain is related to disc pathology. Other possible reasons for back pain could be faulty posture sometimes also contributed by being overweight or related to excessive physical sports related trauma. I suggest also get blood levels for calcium it D checked if not seen it is worthwhile to visit a physiotherapist. Hope this is helpful 