I have recently discovered two things about my nails (1) I have developed horizontal ridges on my thumb nails; and (2) some of the half moons on my nails have disappeared, or are disappearing. I thought this was a weird thing so looked it up to be advised I should visit the doctor to report the horizontal ridges as this indicated I had been ill some time ago. As I have had blood tests in March and the autumn last year and nothing has been wrong I am curious as what on earth is going wrong. I have been gluten free for 2+ years so baffled. Any ideas?