hi I just turned 30 and though I understand aging
not likely significant, likely related to expression as suggested
HI, thanks for using healthcare magic
It is understandable to question any perceived abnormality but the changes that you are describing would not be associated with a significant condition and not likely to cause any issues at all.
As you mentioned, it is related to facial expression, if it is done a lot or for a long period of time.
It is possible that by reducing the particular expression, there may be an improvement in the changes that you are seeing.
There are no conditions or diseases that are associated with a prolonged dent or change except dehydration (lack of fluids in the skin can cause denting to occur), decreased skin fat content in an area, trauma with the formation of scar tissue in a particular area.
I hope this helps, feel free to ask any other questions