how lichen planus will get cure?

Hi Anon,

Welcome to EmpowHER! The cause of lichens planus isn't well known, but you could try doing these things to prevent it from spreading or getting worse:

• Limit stress. Stress can make lichen planus worse.
• Try not to scratch. Covering the rash with a bandage can help.
• Calm the itch. Applying a cool cloth or using an oatmeal bath treatment can help. You can buy an oatmeal bath treatment at a drugstore.
• Try not to injure your skin. A skin injury can cause an outbreak where the skin was injured.

You can also avoid typical outbreak triggers, which include Hepatitis C infection, Hepatitis B vaccine, flu vaccine, certain chemicals, non-steroidal anit-inflammatory drugs and naproxen (Advil, Motrin, Aleve, etc.), and certain heart disease/blood pressure medications.

It's a good idea to talk to your dermatologist for a more specific treatment. Hope that helps!

Best,
Rebecca 

Sources: 
https://www.aad.org/dermatology-a-to-z/diseases-and-treatments/i---l/lichen-planus/tips 
http://www.mayoclinic.org/diseases-conditions/lichen-planus/basics/causes/con-20026040