I will explain in this article About allergic diseases in general, and then I remember the types of allergies that affect the scalp and therefore affect the hair as well as some types of allergies that concern the reader.
What are allergies?
Allergies can be defined in general: as a state of the chemical changes that occur as a result of the body exposed to external or internal stimuli lead to rash or blisters or bubbles or exfoliation of skin and accompanied by itching or other symptoms depend on where you happened to him so influential.
What happens to the body as a result of these influences?
It depends on the influential power over the body's reaction to him and the extent of immunity and resistance that addresses the body so influential.
In this case addresses the human body's immune system represented in the lymphoid cells (Lymphocytes). To the extent that a strong influential as far as increasing the activity of such cells. As lymphoid cells outside the blood vessels may accumulate up to address and resist closely. As a result of the conflict between lymphoid cells and influential changes that result in various symptoms of allergy occur.
What are the symptoms of allergies?
Allergy symptoms are diverse and varied as the symptoms on the skin or are accompanied by other symptoms as a result of the internal organs affected, such as respiratory appear.
