Hello everyone. I have been a member for a little while. Over the last year, I have developed nail problems. I am now taking vitamine B12 shots, and a number of suppliments. I do have PN, some burining in my left foot. Nails are cracked, brittle, length wise ridges, thin, bendable is how I would describe this. I was not always like this. Is there anything else the doctor should do to diagnos me? I have osteo arthritis, DDD, and DJD, does this account for these new changes? thanks all, ginnie