Summary: You may become interested in the subconscious and the occult. Self-denial. Repressed energy can manifest as irritability and unrest. A good time to work alone or in social assistance.
This interpretation is for when Transiting Mars is going through your natal twelfth house.
It is likely that this transit awakens subconscious motivations and psychological impulses. During this period you may begin to be interested in the investigation of the unconscious or in exploring the field of the occult or of parapsychology. It is also a moment of frustration, of self-denial and of staying in the background.
Some repressed energy can manifest itself in the form of irritation and unrest; they are such subtle energies that one often is not aware of them. Patterns of past behavior that have become completely unconscious, are activated without you noticing and now is the time to face them. It is also a good time to work alone or to work in the field of social assistance, where the priority is to help others.