Answers:
it can be several other things. diebetes, celiac desiase, ect.. stir to the doctor and find out. In any overnight case any of the things that make happen this can be enthusiasm threatening. find treatment.
Please,please do not punish yourself beside these thoughts-go and see a doctor.
maybe ask a lesbion to bring on the other leg?
of late for harmonize I don`t know
The worst satchel scenario would be osteosarcoma. It doesn't enjoy to be that, but you'll never know till you see a doctor.