To dream of oxygen represents something in our lives that we feel is required. Noticing that we can’t continue if something isn’t present. Vital energy, love, or resources that’s we’ll fail without.
To dream of not having enough represents a lack of what we feel is most important. Feeling suffocated or smothered by a situation in your life. A relationship that cutting you off from love, respect, or your ability to function normally.
Example: A woman dreamed of seeing her mother breathing from an mask. In waking life she was having a big argument with her mother and trying to convince herself that she still loved her mother. The oxygen reflected how she was telling herself that love was still there when she felt her relationship with her mother was failing.