Yep, it could be that...but more than likely it's friction zits...and what happens is if the zits are pops, they leave those scars---blemishes. One has to use something to clear them up, like proactive or a lightening cream.
Products containing 2% Salicylic acid would do wonders also. Retin A would heal up the scars to some degree and lighten them.
A combination of salicylic acid and retin A are perfect for anti aging and keeping the skin perfectly smooth.