Hi everyone, I've been searching this board reading lots about ridges and dimples and nothing really sounds like what is happening to my thumbnails. For lack of a better word they have a big dent in the middle of each. None of my fingernails are affected and there is absolutely no pain. I do not bite my nails (actually are quite strong) and have had no trauma. I only noticed by looking at them this morning by accident. Just wondering if anyone had any ideas of what could have caused this. Oh I'm also only 27 and take a multivitamin every day. Thanks!