Comedone consist of both whiteheads and blackheads. They are non-inflammatory and are generally consider as same. Sometimes, they are hard to be spot, hence invisible to a naked eye. Open comedone are blackheads, closed comedone are whiteheads.
Is it true that comedone is not harmful at all? It might seem to many that comedone is not harmful at all, but that is all part of acne myths. Comedone, if left untreated, can easily turn into more severe stages like papule or pimple, or even severe acne like cystic acne. It is not wise to left comedone untreated, especially if half of your face covered with comedone. Comedone is like a mosquito , that seems to be harmless to sting on you when they were in their larvae stage. But, if you allow this pest to multiply, chances are, you will get sting everywhere. The wise guy get rid of mosquito when they are in larvae stage, which is the comedone stage for acne.
Clear your acne while it is comedone, if you do not take action, acne will take action. It is not wise to treat acne only when you are dealing with a cystic, especially when the chances of scarring are high. Read more about blackheads.