Blackhead itself consists of two different types, i.e. open comedones or often called with the Blackhead and whitehead are often called closed comedones. Blackhead if note looks like enlarged pores and colored black. The black color is caused due to oxidation by air.
Meanwhile, the blackhead whitehead looks like small bumps under the skin. Bump this results from blockage of the blackhead is a layer of the epidermis by dirt and fat.
Blackheads that grow around the nose occur due to careless facial cleanliness. The excess production of oil glands and also there is dead skin cells make the blockage of the pores of the face.
With the blockage of the pores will thus be it blackheads, comedones this type of blackhead with black color or blackhead whitehead in the layers of the epidermis.
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