<qa>  What is the most common form of LP?Lichen planus LP is an idiopathic inflammatory dermatosis of the skin and mucous membranes. Cutaneous lesions present as pink polygonal papules on the flexor wrists, trunk, thighs, shin and the dorsal hands. Oral lichen planus OLP represents a unique subset of LP and is often the sole manifestation of this disease. Clinically, the lesions can be reticulate, erythematous, atrophic or erosive, with the erosive form being the most common. Lesions can be found anywhere in the oral mucosa and are associated with burning pain which is worsened while eating. The risk of development of squamous cell carcinoma has been estimated to be as high as 5. Treatments for oral lichen planus involve high potency topical steroid, systemic steroids, oraltopical retinoids and immunosuppressants. However, the long term side effects of steroids e.g. striae, skin atrophy, telangiectasias, tachyphylaxis, secondary candidiasis and perioral dermatitis prevent more extensive utilization except in the most severe cases. Given the debilitating nature of OLP, risk of malignant transformation, and long term side effects associated with current therapies, a safe intervention is needed for this disorder. 