Inside the pore are sebaceous glands which produce sebum. When the outer layers of skin shed, as they do continuously, the dead skin cells left behind may become 'glued' together by the sebum. This causes the blockage in the pore, especially when the skin becomes thicker at puberty. The sebaceous glands produce more sebum which builds up behind the blockage, and this sebum harbours various bacteria causing infection and inflammation.
The scaly scalp is the disease of the hairy scalp, it is not usual as the disease of other skin surfaces. The disease is characterized by increased dandruff production and inflammatory processes. The peeling off of dead superficial skin cells is a natural phenomenon. In some cases, however, this process could be highly increased and could be associated with redness and irritation. The scaly scalp could be efficiently treated using special shampoos. The scaly scalp could be also the symptom of various diseases e.g., psoriasis, fungal disease, lousy scalp.
Psoriasis is a chronic, autoimmune disease that appears on the skin. It occurs when the immune system sends out faulty signals that speed up the growth cycle of skin cells. Psoriasis is not contagious. The most common form, plaque psoriasis, is commonly seen as red and white hues of scaly patches appearing on the top first layer of the skin. Some patients, though, have no dermatological symptoms. In plaque psoriasis, skin rapidly accumulates at these sites, which gives it a silvery-white appearance.
The eczema is the chronic, inflammatory disease of the skin, developing due to the disturbance of the equilibrium of the immune function. Its characteristic symptoms are dry skin, itch, thickening skin due to the continuous scratching, rubbing, scraping. The skin along the wrinkles and folds due to the scratching and mechanical stress maybe eroded, lesioned, it can be blistering and oozing.