why would you have a full-body x-ray? this is not something that is usually done by anyone unless they are looking for evidence of metastatic disease and then a ct or mri (no xray exposure with an mri) may be better. obviously the less exposure to x-ray radiation is desirable so your medical provider should really justify the reason for a full-body x-ray. since i don't know your medical history it is difficult to address your concern specifically.
how safe is a full body x-ray?