(Affliction; Bristling with perplexity) In a dream, thorns represent a harsh, difficult, repulsive and a distressful person. Thorns in a dream also represent indebtedness, signing a loan, temptation, degeneration of moral standards, or social unrest.
If a thorn pierces someone in a dream, it means that he will be tried with temptations, or that he will be hurt from something he hates. Walking on thorns in a dream means delaying or postponing payment of one’s debts upon maturity. Thorns in a dream also represent ignorant and evildoing people who uphold respect for nothing, and who have won neither material nor spiritual success in their lives. Thorns in a dream also represent pain and sufferings, complexity of matters, sorrows, distress, difficulties, love, injustice, or harm caused by women.... Islamic Dream Interpretation
Dreaming of thorns means you are stepping on dangerous ground. You could suffer greatly if you rush on without thinking of where you are going, so plan ahead as thoroughly and carefully as you can.... Gypsy Dream Dictionary