Dreams about food and drink can often symbolize nourishment, both physical and emotional. In your dream, pouring milk into a cup that already contains salt may suggest a blending of different feelings or aspects of your life that don't mix well together.

Milk often represents comfort, nurturing, and sustenance, while salt can symbolize preservation, but also harshness or bitterness. The salty, unpleasant taste you experienced in the dream could indicate that something in your life—perhaps a situation or a relationship—that seems nurturing or comforting is actually tainted by negativity or conflict.

Consider reflecting on any current situations or relationships where you feel a mix of comfort and discomfort. This dream might be urging you to address these feelings and find a balance that feels more satisfying. It may also be a sign to cleanse or clarify aspects of your life to avoid that unpleasant mix.