Masks are personalities that are put on or imposed by others.
A mask is neither good or bad, it could protect or hide, its needed to adjust to situations or to a social construct or on the other hand masks may become heavy and irritating.
That said masks are so very broadly categorized they are very difficult to differentiate between oneself and mask. Often the effect of the mask on a person becomes so great the mask has the danger of becoming fused and irremovable.
The only time one may become aware of a mask is through embarrassment or if the mask cracks or breaks or if the mask becomes heavy or uncomfortable
Some questions that I thought of were
Can one exist without masks?
Is "self" just another mask?