What causes dandruff and itchiness?
Dandruff is caused by a microscopic organism called pityriasis. Such a fungus, present on all scalps, usually remains inactive. Why then does it start proliferating on some heads? Researchers do not yet have the definite answer. Some speak of a genetic and endocrinal predisposition, and others of the scalp’s pH, which would trigger its proliferation. What normally happens Normally, our skin renews itself monthly. That also applies to the scalp’s skin. The new cells form themselves in the dermis’ deep layers and then eliminate the dead ones, by pushing them outside the epidermis. This transition takes place without us noticing it because the changes are slow and non synchronous, unlike some animals’ slough. What happens with pityrisasis When the fungus in question starts colonising the scalp, the entire local ecosystem is offset. Under its impulse, the cells’ traffic accelerates, new cells form themselves too quickly (in two weeks, sometimes one), and no longer leave time for the dead c
