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www.reference.com/article/causes-lichen-sclerosus-48548c0a1f99081c

Although the exact causes of lichen sclerosus are unknown, as of 2015, some possible causes include immune system problems and sex hormone imbalances, according to Mayo Clinic. Genetic predisposition to the development of lichen sclerosus has been suggested as a possible origin of the condition.

www.reference.com/article/lichen-planus-1505561621df4750

Lichen planus is an itchy skin rash that is thought to be an immune reaction to certain triggers, states MayoClinic. Though fairly common, the exact reason why it occurs is unknown. Symptoms include mouth sores, skin sores, dry mouth, hair loss, metallic taste and nail ridges.

www.reference.com/article/causes-lichen-planus-34465c3c4e304ce2

The cause of lichen planus is not known, as of 2015, states Mayo Clinic. It is believed to be an auto-immune disease, which means that the immune system of a patient attacks parts of the body as if they are foreign invaders.

www.reference.com/article/lichen-planus-away-3de4bbc6e1143043

Lichen planus usually goes away within two years, according to the American Academy of Dermatology. This skin problem may come and go for years in some people. About one in five have a second outbreak.

www.reference.com/article/lichen-planus-disease-526e52ab554a09c8

The specific cause of lichen planus is not completely understood, but the condition may be associated with individuals who are infected with Hepatitis C and who have been exposed to chemicals, explains the American Skin Association. Lichen planus is not contagious and cannot be passed from person to

www.reference.com/article/resources-tree-bark-identification-cd5e2948d504c97a

Sources for tree bark identification include TreeBarkID.com. This site hosts a comprehensive list of trees that can be searched for bark identification photos. The site focuses on the best characteristics to consider when attempting to identify trees in the lower Midwestern latitudes.

www.reference.com/article/live-lichen-sclerosus-33d010542d2beb80

Living with lichen sclerosus requires various medications to reduce discomfort and the likelihood of scarring, or no treatment at all, depending on the location and severity of the symptoms, according to Mayo Clinic. Some mild cases have no symptoms, states the National Institute of Arthritis and Mu

www.reference.com/article/happens-skin-lichen-planus-disease-488af21ed709bfe3

Lichen planus causes the skin to break out in itchy, purplish bumps that spread, according to Healthline. Often the lesions blister, then scab over. Sometimes thin white lines develop over the rash. The lesions usually clear up on their own within six to 18 months.

www.reference.com/world-view/remove-lichens-tombstones-999f9a065ad2a951

Although there are professional services that remove lichens from gravestones, amateurs can get good results by gently scraping the lichens away with a wooden tongue depressor and water. It is crucial to use a scraping device that is softer than the stone. Hard objects damage the outer layers of the

www.reference.com/article/dogs-bark-95f429fcf8ebc8f0

Barking is a dog's primary means of vocal communication. The Humane Society lists a number of common causes of incessant barking, including attention seeking, boredom, hunger, frustration, excitement, fear and protectiveness. Some dogs bark due to health conditions such as deafness, dementia or Cani