My nails, well, my nails on my pointer and middle fingers of both hands seem to curl when they grow to a certain point. Not totally curl but sort of start growing downwards after so long. They are very thin as well, though so are the rest of my nails but they do not curl. Do they curl because they are thin or what? I have tryed using nail products (like the clear polish that strenghtens them)to strenghten the nails but that doesn't seem to help. Though I chewed them as a child I do not now. Could chewing them as a child make them do that? I always grow my nails long but get bad comments about me when they get to that point so I cut them. Does anyone have any idea what causes this and or how to prevent it from happening?