I am working on a short film and the director and I love using sound to create surrealistic elements to a scene when it is effective and benefits the story. In this scene, the character is coming to an understanding that all of his friends are dead after the ship wreck and realizes he is alone on a desolate island. He gets a very bad, painful headache. I can be extremely creative with this so I want to try to stay away from the famous high pitch whine (tinnitus) and using a low pass filter. so all advice and answers are welcomed.
P.S. I do understand how high pitch tone creates discomfort... But if needed, I would only like to use it subtly.