Scalp Psoriasis Psoriasis is characterized by accelerated cell production and thickening of the outer layer of the skin. These cells do not eventually flake, but build up to form plaques. Plaques are reddish and silver-scaled, and they often itch. They sometimes cover large areas of the scalp, and can be very difficult to treat. The exact cause of Psoriasis is unknown, but immunological and biochemical abnormalities are contenders.
Psoriasis also tends to run in families.
In most cases, Psoriasis can cause a substantial amout of hair loss. There are many factors that may contribute to scalp inflammation. For example, according to McNeil Consumer Products in Canada, scientists have also confirmed that dandruff and other forms of dermatitis conditions can be caused by a microscopic fungus called Pityrosporum Ovale. It is known that this fungus can cause a mild infection at the roots of the hair and cause itch and flakes. Please note that scalp inflammation can happen even if you are not using Rogaine or topical minoxidil.