To dream of hammering nails represents strength and ability in negotiations. The wisecrack, 'getting nailed,' may mean getting caught or suggest sexuality. On the other hand, the phrase 'hitting the nail on the head' means taking full control of a situation.
To notice nails in your dream suggests tiresome labor for insufficient salary.
To see crooked, broken, and corroded nails in your dream means disease or business failure.
A dream involving a scene where you actually hurt yourself with a nail suggests the need to be cautious and tactful in communicating with others.