Drink 1 full tsp baking soda in a glass of water to take away the itch of Lichen Planus. Also when extremly itchy apply ice under a cloth, also I have tried Mr Clean Wipes with Antibacterial and they worked really well. Also just baking soda and water paste applied on the lessions and let dry against skin. One more is, I have applied the little yellow container of Carmex lip balm for cold sores to lessions and it works too. For my mouth I use Oracort Dental Paste that you dab not rub as it turns grandular if you rub it. You only need a ml size of it.