The thorn may signify that we are dedicating ourselves to a difficult element of our spiritual quest we are suffering for our beliefs. The thorn stands for physical suffering in dreams. In matters of health, it may indicate a vulnerability to infection. To dream of being pierced by a thorn or splinter signifies that a minor difficulty has got through our defences. If the thorn draws blood, we need to look at what is happening in our lives that could make us vulnerable. In a woman's dream a thorn, being penetrative, could represent the sexual act, or rather fear of intercourse. For a man thorns may represent sacrifice of some sort. Consult the entries for Crown, Sacrifices and Weeds for further information.