The immune system is a very remarkable part of our bodies. It somehow knows of a problem and rushes antibodies to the site of attack and fixes the problem - automatically. I don't know how. I don't believe science knows how either, but they may come closer than my ruminations. If you have alopecia, you have an immune dysfunction. It thinks hair is the enemy and attacks. What comes after hair? It got all my hair, what's next? It attacked my fingernails. I experienced an indentation across the middle of my nails. Sometimes this developed into a crack well below the quick and was problematic. Anyone else experience this? If so, please reply. Did some other odd deformity occur? If so, please reply.