Blackheads occur when your pores becomes blocked by sebum and dead skin. The black colour is not dirt. When the sebum and dead skin are exposed to the air they oxidize, which turns them black.There are many ways to get rid of them, from homespun remedies to medical treatments.lackheads occur when your pores becomes blocked by sebum and dead skin. The black colour is not dirt. When the sebum and dead skin are exposed to the air they oxidize, which turns them black.
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Thalassemia. The thalassemias are a group of inherited blood disorders in which the genes that produce hemoglobin, the protein in red blood cells that carries oxygen from the lungs to all parts of the body, are broken.halassemia. The thalassemias are a group of inherited blood disorders in which the genes that produce hemoglobin, the protein in red blood cells that carries oxygen from the lungs to all parts of the body, are broken.