Causes: Lichen sclerosis:
The cause is unknown, although an overactive immune system
may play a role. Some people may have a genetic tendency toward the
disease, and studies suggest that abnormal hormone levels may also play
a role. Some scientists believe that an infectious bacterium, called a
spirochete, may cause the changes in the immune system that lead to
lichen sclerosus. (Source: excerpt from Questions and Answers About Lichen Sclerosis: NIAMS)
As with all medical conditions, there may be many causal factors. Further relevant information on causes of Lichen sclerosis may be found in:
16 MEDICAL BOOKS ONLINE! Review excerpts from medical books online, free, without registration, for more information about the causes of Lichen sclerosis.
The cause of lichen planus is unknown. Eruptions similar to lichen planus have been induced by arsenic, bismuth, gold, quinidine, propranolol, and naproxen. Exposure to developers used in color photography may likewise cause an eruption that’s indistinguishable from lichen planus.
Lichen planus is found in all geographic areas, with equal distribution among races. Eruptions of lesions with features characteristic of lichen planus occur most often in middle-age people and are uncommon in young and elderly people.
Source: Professional Guide to Diseases (Eighth Edition), 2005
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