by Nathan » 08 Sep 2009, 13:55
Allergy to sunlight is immune to sunlight, which often is manifested by itching and eczema. The most common areas affected by such an allergy are: neck, outside surface of the hands and legs. Skin reactions in rare cases can become quite severe, causing rash or blisters, which can spread due to skin friction of clothes. Sun allergies occur only in susceptible persons, and in some cases they can last as long as there is sunlight. Scientists do not know exactly why some people are allergic to the sun and others not, hence result that some forms of allergies are genetically acquired. The immune system recognizes some components in contact with the sun that cause skin lesions and body activity triggers a defensive reaction, but it give rise to allergic reactions which take the form of eczema, and in some cases blisters develop a skin rash.