Enantiodromia
The tendency of a force or attitude to turn into its opposite when pushed to an extreme.
Enantiodromia is the ancient principle Jung drew from Heraclitus: excess in one direction eventually produces its reverse. A life of relentless control may collapse into chaos; an endless giver may become resentful.
When a reading warns of imbalance, it is often pointing to this law—inviting you to restore the missing opposite before it arrives as a crisis.