If you feel that you had a nightmare, and this dream still makes you nervous and flustered after waking up, then write down these four sentences on a piece of paper:
Night dreams are unknown
Hanging on the western wall
As soon as the sun comes out
Turn into auspiciousness
Then stick this paper on the west wall of your house (where the sun shines on your convenient wall), so that when the sun comes out in the morning, you can shine on that wall and that paper.
Very clever. Because my friends and I have been using this method to solve nightmares.
good luck