Lichen planus is a chronic, recurrent and itchy rash which has no apparent cure. It is caused due to inflammation in the skin and mucous membranes. It is characterised by small, flat topped polygonal lumps or bumps, which mainly grow together to form rough scaly plaques on the skin. These can appear on any part of the body, especially in areas covered by mucous membranes. They are most likely to appear as lumps or bumps on the wrists, ankles, inside the mouth and also on the scalp. It can also appear as a rash on the genital region and along the lining of the vagina. It can also cause lacy white patches or painful sores to appear on the skin. This skin disorder can also affect the finger nails as well.
The main causes of lichen planus is generally caused due to an abnormal immunity system response to medications. Unlike other skin disorders it is not hereditary neither is it contagious.
Lichen planus is most common amongst middle aged adults. However, middle aged women are more prone to suffering from the disease compared to men. It is a persistent disease, which can appear on several parts of the body for over many weeks or even months.