Keep reading to find out more about what may cause lichen planus.

Like many other skin conditions, lichen planus is a bit of a mystery.

It is thought to be a rare variety of lichen planus.

The symptoms of lichen planus may begin abruptly or gradually.

There are several theories about what may cause lichen planus, but the actual reason remains unknown.

The cause of lichen planus is not known.

There are also reports that lichen planus can flare up years after it is considered cured.

Occasionally, lichen planus may affect your nails as well.

It is sometimes referred to by dermatologists as "mini lichen planus".

Unfortunately, neither of these clues has shed any light on the mystery surrounding lichen planus.

Lichen planus can also affect skin, scalp, nails, and genitals.

It would appear that oral lichen planus is only rarely associated with coeliac disease.

Generally, mild lichen planus doesn't need any treatment.

Oral lichen planus can be chronic and may increase the risk for oral cancer.

Lichen planus may be divided into the following types:

Lichen planus often infects areas such as the wrists and ankles, but it can show up anywhere on your body.

There has been evidence of the condition as a cutaneous manifestation of lichen planus.

It is similar to oral lichen planus.

"Koebnerization" may also occur with skin disorders such as vitiligo and lichen planus.

Lichen planus is not contagious and does not involve any known pathogen.

Lichen planus affects women more than men (at a ratio of 3:2), and occurs most often in middle-aged adults.

An uncommon, recurrent skin condition called lichen planus.

It can also cause lichen planus.

Lichen planus of the scalp ( leading to cicatricial alopecia)

Lichen planus in children is rare.

Lichen ruber moniliformis (Wise-Rein disease)

Wise-Rein disease (Lichen ruber moniliformis) is a rare skin disease named for Fred Wise and Charles R. Rein.

Psoralens are still in use today in PDT regimes to treat a variety of skin conditions, including vitiligo, psoriasis, neurodermitis, eczema, cutaneous T-cell lymphoma and lichen ruber planus.

Pityriasis rubra pilaris (also known as "Devergie's disease," "Lichen ruber acuminatus," and "Lichen ruber pilaris") refers to a group of chronic disorders characterized by reddish orange, scaling plaques and keratotic follicular papules.

Devergie Disease Lichen Acuminatus Lichen Psoriasis Lichen Ruber Acuminatus Pityriasis Pilaris PRP None Pityriasis Rubra Pilaris is a mildly itchy chronic skin disorder that is possibly caused by an inherited metabolic defect.