What does it mean you dream you're having nails on you and sea urchins stings?

The question is difficult to answer because "nails on your" might refer to fingernails, animal claws or carpentry nails of some sort. Some ambiguous sort of "nails" combined with sea urchin stings tend to suggest discomfort, itching, swelling and pain. The dream might have been triggered by actual physical discomfort while sleeping because of sand or some other small, sharp object in bed or in the night clothes. Or, the dream could refer to your emotional irritation from someone's sharp, stinging remarks and criticism.