Q: Can our dosha change over time?
A: Yes they can. We are born into the world with a basic constitution given to us by our parents, much like we also inherited other features like our skin color and facial features from them. Though this constitution will always be our starting point in life, as we live certain ways, have certain experiences, and respond to whatever influences come our way, our basic constitutional nature may shift.
One person may inherit a tremendous amount of earthy energy from their parents, but then become more fiery as they seek out more and more from their life later on. Another person may be particularly unsettled and airy early on, but then ground themselves more as they get older. Though our original constitution will always be significant, the way our body responds to different stimuli may shift over time.