Dreams about health issues, such as a brain aneurysm, often reflect underlying anxieties or concerns about your well-being or mental state. The fact that others in your dream knew about it but kept it a secret from you might suggest feelings of vulnerability or fear of being out of control in your waking life. You may be dealing with a situation where you feel uninformed or excluded from important decisions or information.

This dream could also symbolize a fear of sudden change or an unexpected crisis. It might be beneficial to consider areas in your life where you feel uncertain or where communication may be lacking.

Take this dream as an opportunity to reflect on your current emotional state and any stressors that might be affecting you. It could be helpful to talk to someone you trust about your feelings or seek clarity in situations where you feel left out or uninformed.