Around three years ago, I mashed my left thumb at work. This caused the fingernail
to bruise and eventually come off. However, it has never grown back right. It has yellowing underneath the nail, like a fungus which the dermatologist tested for and was negative, and whiteness on top where the nail looks dead, and you can see the new nail underneath. The doctor didn't think I had damaged the nail bed because it was growing out straight, but is funny looking.