Der er observeret ødelæggelse af talgkirtelceller, fokal epidermal nekrose med en forbigående akut inflammation og diffuse reaktive ændringer i keratinocytter samt forbigående sekundært ødem og inflammation i dermis.
Destruction of sebaceous cells, focal epidermal necrosis with a transient acute inflammation and diffuse reactive changes in the keratinocytes as well as transient secondary oedema and inflammation of dermis are observed.